I'm with Jim on this, lets see your rack so people can understand your question better. It reads quite abstract because of the lack of context.

If you are meaning something like the DivKid / Instruo OchD + Expander, you have loads of outs, most of those outs could be used with the following to get more out of them:
VCA's
Mixers
Passive attenuators
Attenuvertors
Half or Full Wave Rectifiers
Quantisers
Mults
Envelopes

Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.

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