If you have a somewhat more recent version of the Fulldrive II that has the mini-switch option to select modes, the traditional tube screamer type mid-hump in a Fulldrive comes from the "Vintage" mode - move that little mini-switch on the Fulldrive II into FM mode (FLAT MIDS) you can escape the tube screamer mud that the boost in the mids brings on the most recent version of the pedal. From the Fulltone site:
"Vintage" for old-style Fd2 mid-heavy tones that cut through the mix
"FM" stands for "flat-mids" offering a more natural sound but I've enhanced this mode for even more transparency, it sounds great on a strat's Neck Pickup, truly spectacular! .
My rule of thumb is that I boost "open" sounding ODs with "smooth" sounding ODs. For instant a TS-9 into a OCD. I have found this type of stacking to work well. "Smooth" into "Open" usually works well. It keeps things from getting too loose and "splatty".
I have found this combo to work best. I love the OCD, but didn't like it in front of the TIM. I can't run anything in front of My FDII; sounds odd to me. I love the FDII and OCD though. I actually really like all the Fulltone products I have tried.