A quite search of Photrio turns up very little of use. Those who have used it and liked it have not given times or dilutions. Maybe a few can answer specifically. It might help if you were to say what EI you intend to use i.e full box speed, 1600, 1250, 1000. Assuming of course that this is not D3200 that you have already shot.
For what is is worth I have the original Agfa Rodinal development time sheet and it lists D3200 @3200 in Rodinal 1+25 and 1+50 but declares the times are guide only as they had not been tested.
The times listed are : 1+25 = 8 mins 1+50 = 18 mins
Looking at the Massive Development Chart it lists a time for 1+25 as 11 mins but as you may have discovered this is 3 mins more.
However it may be that at least we can be sure that this is user times given the difference and I'd be inclined to use 11 mins as opposed to Agfa's 8 mins D3200 is a low contrast film and is difficult to over- develop
Again you may know this but if it's 135 D3200 the grain will be large. On that point there did seem to be a degree of agreement
Best of luck
pentaxuser