I'd skip the single VCAs and invest in a quad cascading one such as a veils clone ... you can never have too many vcas!!!
and I'd add some attenuators/attenuverters - clouds really needs them - specifically for reducing modulation from fulll voltage range to 'tiny little bits' - less really is more when modulation sources talk to clouds! Happy nerding 3 * MIA is a good example...
take a look at my signature... spend some (& buy some I mean considerable) time thinking deeply about it!!!!
it's really helpful for steering newbies into good practices...
"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