The OCD doesn't work that great as a boost in front of a super hi gain amp, IMO. I have one and love it, but I use it in front of a '77 JMP 2203 which sounds killer!
Honestly, use the TS9 and just add the bass back in via the amp's eq. The bass loss (really a mid hump) with a TS type pedal is what tightens up the amp. I think TS style pedals make the best boosts. Also try the Maxon 808.
In my experience, when you boost with a pedal that has a bass boost in it, the low end is not tightened at all. I have an OCD and a BB Pre and get the same results. YMMV.