Well,there's some food for thought.Divine,your idea of a Stinger/Annihilator Tripod hybrid sounds intriguing,to say the least.Though in my opinion,if it can be made to look like the Nod Reapers in Tiberian Twilight,that would be very fitting.Two Toxin Grenade Launchers should be enough.
I also sort of have a concept for a new stolen tech, following the idea that that kind of units should be most useful against the faction whose technology was stolen. For something that's stolen from Epsilon that would mean good anti-infantry capability and immunity to mind control. So I thought "Hey, the Stinger is kinda cool", and also "Scrin Tripods from TW are also cool".
Basically, I think of something like the fusion of the above-mentioned units, a Stinger on three legs and steroids, lots of steroids... with some sort of toxin grenade launcher, with warheads not unlike the Plague Splatter's, and maybe room for 3 infantry, one in each leg, who could use fireports. Obviously, the tripod being robotic, it would be mind control resistant.
The lore could be that Rashidi, having turned against Yuri, wanted to create a new heavy unit specifically to counter his mind control and infantry divisions. Being inspired by the Chinese Centurion, but recognizing its fatal flaws such as its enormous size and price, he designed a new unit based on his Stingers.
I like the name you came up for your aircraft, the "Defiler". Could fit any Epsilon unit, really, even this one. This tripod would be much smaller than the Centurion, and would also have a different arrangement of legs, think of either TW's tripods, or alternatively, the Strider from HL2, or even its concept art variants, and it would not be an epic unit. Probably also rather lightly armored but fast for its size.
I don't know about that.The "Defiler" name feels appropriate for units using biotoxins or chemotoxins,from my POV.But thanks anyway!