The drive on the Terror is pretty mushy, I only have it set to very mild settings. It can't replicate what a lot of distortion/fuzz pedals can do.
I haven't tried the revised preamp on the new OTBs, but on the original, flat EQ according to BassGearMag who measured it, is achieved with bass/treble at minimum and mids at maximum. Sounds odd, but it's common with passive tonestacks. So don't be afraid to whck the mids up and the bass down!
There are plenty of pedals that don't need a blend to retain lows. Many even boost lows, like the Sovtek Muff reissue, SolidgoldFX Beta and IdiotBox Blower Box. But if the issue is not low end but cutting through the mix, adding clean blend might make you cut through even less!
A Big Muff for example can sound really distorted soloed, but mix it with the band and it just sounds like bass with mega sustain! I don't know what pedals you're using but I like various Tech21 pedals like the VTDI / YYZ / DP3X that have really agressive upper midrange to cut through.