Kinks is really useful in 4 hp (there's a wave modifier, a comparator, noise and sample and hold) and so is disting (yeah it's a bit difficult to use, but it' so useful)

Marbles could add a nice degree of randomness into the mix and maybe a smaller vco (dixie 2 or something) and an lpg (lxd)

"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