[SixOfSpades]

First off: You can't run out of Saving Throws. There's no such thing as "saving them for the final battle."

Second: Even BioWare isn't completely clear about what the gaseous spells are. The thread that Wilbur is talking about was about Cloudkill: In BG2, you can find Wands of Cloudkill (I was so jazzed when I found a spell that powerful in Wand form), and there's a bug connected with them. The Cloudkill spell, cast from memory, can be blocked by creatures with a high Magic Resistance. The Cloudkill spell, from a Wand, ignores Magic Resistance. One of the BaldurDash Fixpacks corrects this bug (the Wands now are subject to MR), but I for one feel the spell shouldn't be blockable at all. (And I didn't even know Cloudkill was subject to Magic Resistance, as I never needed to waste a spell-slot on it.)

Anyway, ways to block it: You may not have noticed it, but there are little pockets in the Throne Room where there is no Cloudkill--only Stinking Cloud. Not only that, but the DoppelGangers can't see you hiding in the corner there. I usually just wait it out. Alternatively, put all your Saving Throw stuff on your best Tank and have him do the brawling while everyone else is suckin' down Healing Potions and slumping to the floor unconscious. The Cloudkill hurts the Doppelgangers as well, not just you.