The Cizin i considered but decided it was too high-end unit for what i was thinking. Not to mention expensive in BV. I mean, nothing exactly advanced. Come to think of this, the Thunderbirds may be too good for this unit!
I was going purely by Nova Cat and IS Clan General lists for transports, though i suppose i could expand to DC options. Won't hurt and plausible enough. As it is, i actually think the Nova Cat MUL list could use more stuff from the Draconis Combine.
I do however limit myself to units that have miniature available, there's not one for R10 ICV or Maxim II.
This is more of a in principle thing. I'm not hopeful IWM vehicle or BA miniature selection will get better anytime soon, however.
I actually have no intention of getting stuff for this anytime soon. I generally let projects sit for a while after initial plan, to see if i'm still interested in them later on. If i am, then i'll consider if and when i could get required minis.
(There's also currently some problems with some units i want being unavailable in Europe at all, not listed on store pages for reasons unknown. But i hope this will change.)
As for the suggested OmniMechs, the Arctic Cheetah is on "maybe" list, but i'm inclined to place it with my pure OmniMech unit as that has a slot open, really would like to toss the Grendel from it. The Huntsman i don't really like for no particular reason, and i already got the Shadow Cat in the OmniMech unit.
The Avalanche and Wendigo are Dark Age designs, and the Shadow Cat III is a Late Republic era unit, so none of them are options, unless i decide to make a Dark age era unit instead. Something i'm considering.
Various IICs, like the Jenner IIC, i'm waiting for the next KS adding them, and i have other plans for them already. Project Phoenix designs would be OK in principle, and something to consider.
Think i'll relax having just a pure Trinary, and attach 5x transports to the BA if i can't find bigger ones. 5 vehicles would be essentially a "half-Star", not really canon but i'm willing to bend things at times. This will give more freedom for the vehicle Star.