Yes Galuf is right with Doom Gaze. If hunting him make sure your levels don't end with a 5 or a 0 as he will always open with lvl 5.0 doom. Strago is great to use fighting him as he learns his more powerful blue magic from Doomgazes attacks. Also I like to get Oden before having a nap at Doma, as Oden/Raiden Espers come in very handy in Doma.