I'll never pass up on the good ol' Yellow Jacket.
Sure, it's just a flying Gauss Rifle and the very definition of a glass cannon but there's something wonderful about bringing a whole swarm of the damn things and just pelting enemies at long range while retaining a sweet +3 to +4 movement modifier (remember: VTOLs in flight have a +1 movement mod by default). And I say "swarm" for a reason, the things are damn cheap C-billwise, and also cheaper than its memetic partner the Hollander in terms of BV.
And if you're playing 3060 and beyond, there's always the Yellow Jacket's little brother: the Hawk Moth. Sure, Light Gauss Rifles don't hit as hard, but the damn thing is even harder to hit and has more range and ammunition than the OG Flying Gauss. And it's cheaper, so it has even better swarming potential.