Currently I've got a Weapon-of-Legacy ability that gives me Mirror Image 3x/day at 10th caster level and a Ring of Counterspells with a DM in it. We're 14th level. The GM ruled that RoCounterspells only works against targeted effects, so when I put the mirrors up we get pounded with bursts nobody can stop. Even if it's targeted effects, the problem is "mooks" with DM at, apparently 10th caster level ... six guys whipping off targeted dispels eats through the defense screen AND all of the spells. Simple math, eventually ... roll often enough (and targeted dispel gets more rolls the more spells you have) and you're going to roll high enough to hit my CL 14. I could, say, ready a counterspell action with my own DM ... where-upon I'd kill one of theirs and get hit with, say, another two or three. Additionally, sometimes it's Sorcerers tossing DMs and sometimes its outsiders using DM SLAs and you can't counterspell or Silence SLAs ... so we have to figure out which type they're using and come prepared. Last time we tried summoning an Avoral to ready Counterspell-Use DM SLAs and got hit with DM SLAs that couldn't be stopped ... this time we didn't bother with the Avoral and it was sorcerers.
It's not purely targeted at me, usually "whoever is fighting" it seems, which, because I'm a melee cleric, means mostly me (I'm also the only 10' tall winged angel with a nimbus of light (Lesser Holy Transformation+Righteous Might+Sunlight). So I'm not calling foul on the DM ... just that the DM has pretty much figured out how to neutralize my particular character. Other people in the party get hit, and the whole party is clerics ... just that my style focuses on buffs while, say, the rogue/cleric uses more Swift spells like Grave Strike or the caster-cleric uses various blasty-spells. The last guy doesn't cast much, he's mostly item-based, only 3 levels of cleric, so he gets annoyed when we get hit with the DM bombs, but all of his combat ability is in place.
And it isn't like targeted dispels KILL us ... they are "wasting" rounds in which they could be casting damage spells. But they're burning out 3rd level slots on half a dozen minor badguys while, say, some Huge tank-monster pounds out 50 points of damage a round ... they're not doing HP damage ... but if I spend 3 rounds buffing and a 6th, 5th, and 4th level slot that they spend 1 round and three 3rd level slots destroying, that's a net gain in their favor. Additionally, we're running up on situations where we NEED certain spells in order to effectively survive or fight. If they can just strip all of our spells every time we show up, we have to retreat, and honestly it comes to a stalemate and is getting really really boring. We've spent three or four entire sessions, each accounting for a game-day of pop in, fight for 13-14 rounds, and pop out with all our spell slots empty and/or dispelled.
I've used Holy Storm in the past, and I'll probably stock up on a few more of those, it just comes down "on you" and I have to be in the middle of the hurt (with my spells all gone). Assay Spell Resistance sounds good ... too-good is probably just-good-enough given that I'm anything but caster-focused. Right now all of the caster-buff items are on the caster-cleric ... all our metamagic rods, the prayer beads, etc.
I've been counting Magic Vestment in the "can be targeted-dispelled" column, but I guess, as it's on my armor, they do have to target that. The floating shield thing ... I don't have one. I SHOULD have one, but 1) I think the visual doesn't appeal to me and 2) I'm a bit wealth-poor. I have a Weapon of Legacy that has resulted in my being passed over for alot of stuff and some of my Wealth being a magical sword that, while cool and cannot be sold for RP reasons, I'm not going to use. Usually I pride myself on my character being item-independant ... most of my juice is spells, and there's not been any difference between my combat prowess and the prowess of the other characters. Until I get riddled with dispels and suddenly I'm wishing my Strength enhancement was in a belt and my flying was in my boots, etc.
--fje