A good rule of thumb for finding a development time with semi-standing development is to double the normal development time. SO, if normal is Rodinal 1+50 for 9 minutes ( the time from Digital Truth ), use 18' and agitate 5 seconds every fifth minute, at 68 degrees.
To increase the dilution, use a factor drawn from the relationship of 1+25 : 1+50. (Digital Truth) 1+25 = 5, 1+50 = 9 ( 9/5=1.8x )
So, increasing 1+50 @ 18' to 1+100 x 1.8 x = 32 1/2.
I've found 5 minute agitation cycles to be a good balance of the benefits of standing development without the risks. It WILL give increased shadow detail while holding the highlights back.
You could use ID-11 1+3, for the same time, with 5 minute agitation cycles ( time estimated on the same basis as Rodinal ). You'd probably get lower highlight density, higher shadow density, and finer grain.
Perceptol ( at high dilutions ) is functionally the same as ID11, but slower, so it would probably be the same.
Good luck: show us what happens !
don