I beat the boss as a wizard at level 33 steukie, just use frost, hit n' run (^_^). If you find it hard just get your level up a bit higher then try it, but it isn't too hard.
bubblemasta made a complete guide that has everything about amorphous+ Glitches, how to get all the awards, rewards, full bestiary, gloopie location, how to kill them, a recomendation about which rewards you should get first, strategies for difficult things like how to find queen and razor queen, aquire the 15 deaths, and how to survive 10 mins. In bounty run at http://www.amorphousguide.com/ if you have any questions, suggestions, or feedback, shout him. *THERE'S A CHAT BOX!* keep this message alive!!!!!! Thanks for the comment! lalalalala!
I find it's reeeallly glitchy for me first one of my heroes got an attack rate of 6, then my normal mages and warriors, when i upgraded them with speed only got half of the speed they should get when upgraded, then i find that the first unit i place on the field does like 2x damage throughout the whole level.