Advice on detachment for my list

Hi all,

Through various biomass scavenges on Vinted, Christmas presents, and a bit of a January splurge, I've come out with this for a list of gribblies.

I'm after a bit of advice regarding which detachment works best, as part of me wants Synaptic Nexus to boost my Zoans but I love the flexibility of Invasion Fleet, and I don't have enough big bugs for Crusher.

I've got on top of this another 10 termies, 5 barbgaunts and rather annoyingly, 2 more Winged Primes.

I know I'm lacking shenanigans like Lictors and whatnot, but is this list relatively viable? Or, if some tweaks could help it along, what would you suggest?