I think many of your issues can be addressed.(as others also try to help you with)
I use the MOD Dwarf for my metal band
I use a filled pedal board featuring an AIDA-X, a regular amp sim for a different guitar channel, IR, reverbs, a complete vocal chain with 6 effects, a recorder, an audio player, EQ, … and Still I’m still at 82% load when idling.
Did you use the Portal plugin?
It is CRUCIAL for complex board because, when used correctly, it takes load of the processor.
also; I never switch AIDA-X profiles live.
I switch chains with the switcher.