I just played a neat game starring a couple of my favorite units:
IT9sm-86Mfv. I was quite unsure how to open: I didn't want too many Wild Drones since they don't work well with Defense Grid, but I really wanted an early Conduit to get a Xeno Guardian and eventually a Gauss Fabricator, so I ponied up for two Wild Drones. Then my opponent's extremely passive opening (he also missed a free Engineer kill) meant I didn't really need the Xeno in a hurry after all, so I got Tarsiers instead.
But okay, once the opening had sorta played itself out, my opponent committed very heavily to freeze, spending all his red on Frostbites. I had just started ossifying, and had actually already bought a second Xeno Guardian, thinking "well the first one is about to die, so this is like a
Steelsplitter with a Gauss Charge and a Barrier". But once he started getting Frostbites, my plan just got even better: I'll mass Xeno Guardians and Ossified Drones! As long as I only use Doomed Wall for defense, never Wall, his Frostbites can only freeze for 2, which decreases their value a lot; and Xeno/Ossified are both very freeze-resistant, because they can still do their stuff while defending.
In the end I actually piled out Xeno Guardians, which may be a first for me; my Ossified Drones made a mockery of his freeze; I hit what may be a personal record of 51 health in blockers after committing my attackers (ie, none); and I built a Gauss Fabricator without instantly losing, which is what usually happens when I build one.