I like E9 cyclops, yet they need some items to fight effectively if they don't have any other magic, due to their crap base Att/def.
From then they are pretty powerful as fighters, then have nice support spells such as LoS and Weapons of Sharpness, can cast Earthquakes and craploads of BW, then create armies of Statues when you've climbed Ench tree, go for an "artifact rush" with FotA...
Dunno if all this is really "competitive" but it's very nice
