No amount of invisiblity saves you when over 300,000 MLRS bomblets drop on your posistion exterminating all living things for several acres.
Well, right. But AFAICT, preds like staying fairly close to their prey. I mean, I guess if you lose a whole platoon or company or whatever and no longer have anyone nearby
then you could paste the area with your MLRS and not care, but otherwise? Also, if you start using that sort of thing, then they might start using their invisible space ships, in which case the nukes will probably come out and all bets are off.
Mind, those shoulder cannons are probably decent anti-air weapons.