First off, thank you for being patient and trying to help out! Nice to see that the internet still has nice people!
So I did as you said, sounds fine, there aren't any weird volume jumps and I can use the volume controls on both to get them even. I have to say though, it sounds a lot better now, without the HX, so there might be some tone sucking going on there. It's also a lot quieter (no hiss whatsoever).
I did put a horizon drive in the HX to push the front a bit and get a bit more gain, but i was very conservative with it (gain at 0.5, level at about 7).
Maybe I'll give you the whole FX chain that I had set up: in - compressor (only for clean channel) - noise gate - wah - horizon drive - FX loop - 10 BAND EQ (only for leads and at 0.0db) - simple delay (leads and clean) - spring reverb (clean). I tried to make sure nothing added any gain or volume in the chain, only in the compressor i had to add about 6-7db to get unity with the original signal..
Hope this helps! And thanks again :)