Guild Wars: Mind Blast Arena
E/Me Clumsy Mind BlasterI subbed Liquid Flame for Fireball and Glyph of Immolation for Mark of Rodgort, because I'd rather avoid 2s casts and the Mark wasn't sticking a whole lot.
12+2+1 Fire Magic
8+1 Energy Storage
Glyph of Immolation
Flame Djinn's Haste
Easy to play, decent damage and melee shutdown and the all-important ability to kick an assassin in the nuts. I'm not sure that you really need Fire Attunement but it doesn't hurt to have it. No self heal, so knowing when to run away is pretty important. For the most part, you can just load up with Attunement and a Glyph and then just alternate Mind Blast and Clumsiness on a hapless melee type, while keeping another one near-perma-snared with Imagined Burden.
Don't forget your high energy (+30e/-2r) equipment swap - very important for Mind Blast builds.