A funny combination I shoot from time to time is FP4+ @200 and Delta 3200 @3200 which I develop @6400. In DD-X 1+4, the FP4+ @200 is 12:00 while the Delta 3200 @6400 is 12:30 and I find the :30 is not that critical for the FP4+ after 12 minutes so I develop both for 12:30 and they turn out great. Just odd that one is 200 and the other 6400 EI in the same tank for the same time! Delta 100 @100 is 12:00 so I can toss that in too. HP5+ @1600 is 13:00 so OK to do with the Delta 3200 at least