I haven't played DII, so I don't know how the meteor works on there. But, if I understand you correctly, it's basically a smaller radius version of Rain of Ice, so it has multiple meteors. But what about this: what if he got a meteor ability that's basically just one meteor that does massive damage to whatever it hits, but it's a really slow attack, IE, Rook's Hammer Slam. So: it only damages a small area, you have to aim it, the meteor comes down fairly slowly, but if you hit, it does massive damage. Like I said, think Hammer Slam.