Not completely: I am deploying a 0/2/2 strategy on two other machines, a 0/0/2 on a third and a 4/2/2 on a fourth.Preliminary indications are that the 24/0/0 strategy results in ARP workunits taking >65h each; an 18/0/0 strategy reduces that to about 40-50h and a 12//0/0 to about 30-40. A 12/6/6 pushes that back up to >>50h. My plan was to run a strategy for 1 week and calculate a mean number of ARP points per day from the daily device totals for days 3 to 7, change strategy at the end of day 7 and repeat.
However, your strategy is an attractive one: using a stepwise change in strategy of 3 units each time, it would take 10 weeks to do the suggested cycle. It would certainly make for a good pilot.

Yes: 1 x 2P, 2 x 4P, 1x 4P4V, 1 x 12P12VI am trying to maximise my useful output. I assume that
(i) the fastest machines (quickest turnaround) are assigned the stragglers, i.e. to shorten the backlog faster in the tail than it is growing at the head; and
(ii) 12 units every ~30h is of more use than 24 every ~60h.It's far to early to tell: those figures are not 'pure' i.e. the longer a unit takes, the more likely it is that the processing time is a result of a hybrid (exploratory) strategy. Hence the calculation of the mean from days 3-7 of a single strategy, after the previous strategy has been flushed out.
One thing that I am unclear about: do all the ARP units contain roughly the same amount of work (as measured by 'points')? I ask because a 4/0/0 strategy on the 4P4V machine can turnaround ~400 point units in ~15h (~108 points per hour); a 6/0/0 turns ~500 point units in ~20h (~150pph) and an 8/0/0 ~550 point units in ~28h(~160 pph). This roughly translates to a 4/0/0 strategy processing ~6.4 units per day; a 6/0/0 processing ~7.2 and a 8/0/0 processing ~6.9.
So are the 6.4 '15h' units more valuable than the 7.2 '20h' or the 6.9 '28h' ones? My idea is that they would be if they were 'backlog' units; if backlog units could be targeted to machines running a confirmed optimal turnaround strategy (perhaps the above 6/0/0 or 18/0/0) then that would satisfy my aim to maximise useful output by chipping away at the backlog, albeit at the 'cost' of overall points. In effect, satisfying work as opposed to best-paid work.

I have an Intel Core i9-10850K @4.9GHz (ten cores/20 threads) that is currently running 19 ARP tasks. The computer is set to run all projects.

Latest stats:

Average Generation: 83.6
Pace (average time to complete a generation): 4.0 (7-day average)

first_indexed       generation num_units_currently_on_generation num_units_completed_last_day 
------------------- ---------- --------------------------------- ---------------------------- 
2019-10-01 22:26:53 000                                                                       
2019-10-30 18:58:54 001        6                                                              
2019-12-08 11:56:25 002                                                                       
2020-01-12 02:02:34 003                                                                       
2020-02-08 03:43:00 004                                                                       
2020-02-24 06:27:42 005                                                                       
2020-03-09 17:38:25 006                                                                       
2020-03-17 08:44:19 007                                                                       
2020-03-23 20:52:24 008                                                                       
2020-04-01 14:39:46 009                                                                       
2020-04-12 08:29:32 010                                                                       
2020-04-21 02:41:36 011                                                                       
2020-05-02 03:16:28 012                                                                       
2020-05-10 13:29:40 013                                                                       
2020-05-22 10:46:51 014                                                                       
2020-06-02 21:07:48 015                                                                       
2020-06-20 20:53:08 016                                                                       
2020-07-01 12:31:12 017                                                                       
2020-07-09 18:39:23 018                                                                       
2020-07-18 16:08:31 019                                                                       
2020-07-26 16:32:08 020                                                                       
2020-08-08 15:15:22 021                                                                       
2020-08-19 00:49:10 022                                                                       
2020-08-24 07:02:09 023                                                                       
2020-08-30 05:56:33 024                                                                       
2020-09-04 11:35:58 025                                                                       
2020-09-09 17:27:07 026                                                                       
2020-09-15 06:25:11 027                                                                       
2020-09-20 10:01:14 028                                                                       
2020-09-25 22:07:49 029                                                                       
2020-10-02 07:08:22 030                                                                       
2020-10-07 17:55:57 031                                                                       
2020-10-14 16:25:19 032                                                                       
2020-10-18 20:05:40 033                                                                       
2020-10-25 15:34:22 034                                                                       
2020-10-31 22:55:26 035                                                                       
2020-11-04 06:29:28 036                                                                       
2020-11-12 06:33:47 037                                                                       
2020-11-17 09:21:26 038                                                                       
2020-11-24 13:47:28 039                                                                       
2020-11-30 07:44:02 040                                                                       
2020-12-07 20:20:00 041                                                                       
2020-12-13 18:26:56 042                                                                       
2020-12-20 00:33:11 043                                          2                            
2020-12-25 22:27:11 044        3                                                              
2021-01-01 07:57:34 045        1                                 4                            
2021-01-07 18:08:33 046        4                                 1                            
2021-01-15 02:41:00 047        1                                 2                            
2021-01-22 20:25:40 048        4                                                              
2021-01-28 10:53:04 049        6                                 1                            
2021-02-03 14:32:54 050        4                                 2                            
2021-02-09 03:20:45 051        2                                                              
2021-02-16 14:14:47 052        4                                 4                            
2021-02-22 01:22:20 053        7                                 2                            
2021-02-28 10:29:30 054        5                                 3                            
2021-03-06 18:23:14 055        7                                 3                            
2021-03-12 10:16:29 056        7                                 2                            
2021-03-17 08:30:15 057        5                                 2                            
2021-03-23 06:08:46 058        6                                 2                            
2021-03-29 22:39:10 059        6                                 3                            
2021-04-05 05:01:38 060        9                                 2                            
2021-04-10 21:09:07 061        5                                 4                            
2021-04-16 23:20:59 062        9                                 7                            
2021-04-22 07:50:06 063        12                                4                            
2021-04-28 23:02:38 064        9                                 5                            
2021-05-04 04:45:55 065        10                                3                            
2021-05-09 14:11:18 066        7                                 3                            
2021-05-16 14:55:41 067        9                                 6                            
2021-05-23 15:02:08 068        10                                8                            
2021-05-26 06:43:43 069        14                                8                            
2021-05-29 18:38:55 070        12                                8                            
2021-06-03 15:46:15 071        13                                5                            
2021-06-11 23:13:21 072        15                                11                           
2021-06-15 11:54:58 073        17                                11                           
2021-06-22 00:30:34 074        21                                5                            
2021-06-27 11:56:43 075        13                                5                            
2021-07-02 15:06:05 076        18                                2                            
2021-07-08 20:49:12 077        12                                15                           
2021-07-14 07:30:06 078        32                                18                           
2021-07-18 14:21:26 079        80                                41                           
2021-07-20 23:37:16 080        729                               456                          
2021-07-23 21:00:51 081        3103                              1110                         
2021-07-27 02:27:09 082        6020                              1690                         
2021-07-29 02:04:50 083        6787                              1706                         
2021-07-30 14:32:48 084        6403                              1593                         
2021-08-03 02:15:23 085        5159                              1229                         
2021-08-05 08:06:31 086        3524                              775                          
2021-08-08 05:34:18 087        1969                              407                          
2021-08-11 02:09:16 088        1183                              108                          
2021-08-14 02:27:13 089        298                               29                           
2021-08-17 22:32:03 090        29                                                             

I am trying to understand the structure of these various generations and workunit priority; I am reading this thread from the beginning and trying to answer the following questions:
(i) What is a 'generation' of workunits?
(ii) I read that a unit is a 'plot of land'; What sort of sizes are they, typically (and atypically)?
(iii) How does a generation (i.e. 001) get stuck?
I'd greatly appreciate any pointers to articles that could answer these (and other) questions.
Many thanks