I'm VR2 and doing a V2ish zone. I seem to be having the opposite problem as some. I'm doing fine with bosses, but any given group of three trash mobs is more of a challenge than it seems like it should be unless I'm able to use my ultimate. I survive typically, but only after a pretty tense fight and burning a full mana bar. If I get unlucky with lag or pull an additional mob, I can end up in real trouble.
I'm a templar, light armor, 0/49/0 using gear for magicka (close to softcap with drink), destruction/restoration staves.
I've tried using volcanic rune. That helps me get dots on them initially, but once the fight gets going, things get worse if I try to be too defensive. It seems like my best bet is to kill as quickly as possible. Spamming impulse (I'm using the fire ring morph) doesn't do enough damage.