ok varigate 4+ as a sequencer - read this thread on muffs: https://www.muffwiggler.com/forum/viewtopic.php?t=214970, if you haven't already, not a great v/oct sequencer by the sound of it! but maybe it suits you
there's quite a bit of functional duplication in the crossfader department - I don't actually think I've ever seen a rack with so many before definitely not this size! I would start with one - which will help free up space for a better sequencer, if that's what you decide - maybe keep the antimatter audio one - gain 10hp
there are other things that could be reduced in size or removed:
do you really need an output module? - maybe - if it's just for headphones then there's a 2hp alm hpo module that will do that - gain 4hp
the z5000 could be replaced with an fx aid xl - gain 2hp
the quad vca could be replaced with something smaller - either another veils or the 3 channel happy nerding vca perhaps - gain 6hp
the function could be replaced with a second pip slope - gain 4hp
maybe if you replace the sequencer you will get one with a built in clock - so you do not need the horologic solum - gain 4hp
plus the varigate 4+ for another 12hp
if you do all those things that would give you about 40 hp to put a sequencer in - which will give you a much better choice - you can always put another crossfader back in after finding the right sequencer
even if you are looking to stay with the varigate - I'd consider all those possible changes - definitely something to think about, as it will leave you some space to explore
"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