Well, I'd say that even in a tiny venue, (like living room small) a CLR in wedge position faced away from the audience will not be heard very well. That speaker grill has to be pointed at who you want to hear it. Even in our (pretty small) practice room, my band members can't hear my CLR if I use it as a wedge. Monitors are pretty directional, even the CLR's. Now... you can put a CLR on a pole and set it to FF mode, and it will open up quite a bit. That would be the first thing I would do before I cut any thing out of my sound.
Have the other guitar player lay his combo amp on it's back with a couple of books or something under it to put it on an angle facing him (and away from everyone else) and see how well you hear him then...
I'll tell you I don't make many cuts to my presets. Maybe below 60-70Hz in the amp block, and above 9K, but I just have not found the need to do it, and I cut pretty well. Granted, I'm only 1 guitar, but we have multiple sets of keys and vocals going on, and a hard hitting busy drummer and a bass player who fills tons of sonic space. Cut if you have a collision or swirling or muddy sound, but too many guys cut their tone to bits unnecessarily IMO because they read that they should. Sometimes if you can't be heard, it's because your sound is too thin...
800-1.5Khz is where you will really come through in most cases though. You could try boosting there.