So what do you do if your opponents are immune to life drain? (Undead, high mr). Lightning resistance would keep him from getting killed by a mixed seasonal spirit/undead force, but I don't see how it'd do any damage.
Hmmm, starshine cap is +2 MR... better than nothing, I suppose, if I replace a misc with the ring for whichever seasonal spirit is causing me pain (air/cold/fire). 21MR isn't great, but should hold up against most AI mages.