As easy as One-Tzu-Three:
"In difficult ground, press on;
In encircled ground, devise stratagems;
In death ground, fight."
-- Sun Tzu in The Art of War (circa 400 B.C.)
Five thousand years later, in the time of the Fourth Interstellar War, the advice still makes sense.
The Bugs have a superior drive technology, overwhelming numbers, and a strategy that's mind-numbingly alien. For the humans and their enemies-turned-allies, the catlike Orions, choosing their strategy was as easy as One-Tzu-Three: