Protective Spirit. I can't tell you how many times that gets cast on me while I'd playing. After that Sunspear Rebirth Signet, which is just plain better than Res Signet.
Mesmers are used in PvE for Cryway. Anything else they're overpowered by any other class simply because their powerful shutdown doesn't work that great when monsters drop like flies. So therefore, I said what I said based on my opinion of playing my mesmer through Guild Wars and getting totally bored of it, because I cast one thing on a monster and he dies before I get to do anything else. So the only thing I can run is E-Surge otherwise my skills are wasted due to the fact that 1 ele makes everything I fight, blow up.