things that are usually good to pair with semis will probably work perfectly
so modulation and utilities are good starting points
Maths, zadar, pams, batumi etc etc etc (they'll mostly be in the categories envelope generator, lfo or function generator)
I'd also usually recommend a utility starter set of links, kinks, shades (or similar functions in different modules) and a quad cascading vca, such as veils (veils specifically because it's more versatile than most, 10hp and reasonably inexpensive) NB kinks is discontinued so if you can find one buy it
after that I'd start thinking about adding an extra voice of some kind - probably a vco, filter and an end of chain mixer, unless you've already got that covered externally
"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