Shapeshifter

The Shapeshifter is a class I've always found interesting but never given a chance. I'm aware that they are pretty underpowered and I don't really see the best way to use them.

So, what do you guys think of this class. Any tips on making it a powerful character? How about into TOB?

Also, what about a shapeshifter dualed to fighter? Would that work and are there really any benefits?

Thanks!