Well, the Berserker class is classified by madness. Lovecraft is less of a get in your face and smash you fighter like Heracles was. What he does when he goes mad is start summoning Things That Man Was Not Meant To Know and warping the general space of the area around him. The more insane with fear he becomes, the more powerful the things summoned and the worse the space is warped.
Basically, a take on the class other than guy who goes crazy and hit's things. More of an environmental hazard, really.
Hey son, wanna' learn how ta' make witch balls?