or batumi, branches, zadar
or tides, a matrix mixer (doepfer, 4ms vcam, a n other), fx aid xl
or stages, 3mia, 3vca
or beads, rings, pamelas new workout
basically any combination of sound modifiers, modulation and utilities
see the formula in my signature - it's a rough guide to building a balanced modular
I'd probably not add more than 1 or 2 more sound sources - possibly tides and rings - tides can double as a modulation source and rings as a sound modifier - otherwise you won't have space for the more interesting modules that you'll need to support them...
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities