stages is great - a very useful module
one strategy for making modulation more interesting and to go further, which is generally less expensive than buying lots of modulation sources is to add more utilities
for example a matrix mixer would be a good idea - so you can, for example, mix 2 decay envelopes from stages with 2 outputs from Maths
"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