The Mimetic has a reset input called "origin" that takes the sequencer back to the upper left corner (if you're following the lights). So you'll need another source that is sending out a gate/trigger after five beats. There are a few ways to accomplish this. Temps Utile, Pamela's New Workout, Befaco Muxlicer, a MIDI track in your sequencer dedicated to one gate output of the Mutant Brain.
The Basilimus Alter would make a better module for kick drums and simple snares than the Loquelic. It can do both with the right modulation at the right time (those non-sexy modules Lugia mentioned).
If the modular that your building doesn't have LFOs, envelopes, sample and hold, quantizers, attenuators, etc. then you have a really expensive synth that isn't even capable of doing what a semi-modular (like a $300 Neutron) can do.
Noise Engineering offers a lot of its hardware offerings as virtual plug-ins. You'd save a bunch of money and have a much more capable system keeping it all software (even if you have to buy Reason for Rack Extensions).
You can buy this rig but the amount of satisfaction you'll receive from it... not as much as you'd hope for the price.