The only time SB in dungeons is going to cause a wipe is if people just refuse to do the place normally. Nowhere is it stated that you MUST pull everything in a dungeon at once. If pulls are normal sized, a few accessories aren't going to hurt you. Sure, you don't want a tank in nothing BUT SB gear, but I've never seen that happen anyway.

Most of the potency is in the weapon. If these guys are toting a i100-110 weapon around in WP or AK for instance, you'll be just fine as long as you don't get crazy.