I added the noxious trait to my subterranean terravore crisis rush. The extra army strength is tight, since I don't build fleets early and rely entirely on being uninvadable for defense. I have 80% habitability on all my planets even when I've eaten them down to nubs. The strategy is to rush colonize a bunch of planets early on, spam unity structures to rush to the crisis perk, eat every planet down to ALMOST nothing, then complete eating the planets right as soon as I get the perk, which counts toward my menace and gets me menacing corvettes right away.
From there it's a matter of taking my absurd mineral production and mass producing menacing corvettes WAY before the galaxy is ready to handle it. Eat all the planets, get all the menace, eat the stars, then eat reality.