i dont think storm is immune to being struck by lightning moreso than she psionically manipulates them away from her body. however, in Xtreme Xmen she created an outfit out of charged particles from lighting when she and gambit was gettin it on in the lake and they were interrupted by those gov agents, but im willing to wager that it wouldnt be a lost cuase for Electro to try to zap her nonetheless.
and also i believe with his new upgrades and the fact that he now knows almost the full range of his power(especially since Doc Ock schooled him a little about having that kind of power) he would be able to create shields and fly and manipulate magentic fields, for when last he fought spiderman(MK) he was ionizing cars and other heavy metal objects and tossing them around, and was handling them the same way one with telekineisis or magnetism would.
but the only reason i think he loses is becuase he just started expanding on all these abilites while storm has had danger Room practice since she was 17