Here are a couple examples to back up my previous post.
1st build vs
2nd build The second link avoids polymorph like you suggested. Notice how little of a damage increase you get in exchange for sacrificing it entirely.
Now, if you take that to an extreme, you can screw yourself over though.
3rd build In this last link, you can see that if you spread yourself too thin, you can cut your damage substantially. (to about 2/3 per attack). That might not seem like *too* much, but it is certainly the difference between 1 round kill or not. Or vs bosses, 1 round armor strip or not.
