Solo BM isn't as hard as you'd think, since he oozes death from his fingertips in the beginning, making the rough early stage levelling comparatively easier than most of the other classes except the fighter (Who just pwns everything).

But if you fight Kary before Class Change, she'll give you Hell just like you've always imagined it.

And if you don't class change...

Well, if you don't class change I'm pretyty sure you get Ice3 anyway, so it that ain't no big deal.