Hymie's page

I should have said this is like my 3rd character since I came back. The first couple were more cut and dry so I could try and get accustomed to the "new" way of things.
I found a pretty basic build I'm going to try out.

Basically I'm new to the class and have a few questions. I'm a returning player, haven't played since like 1985 so please be kind.
First, Trying to get used to the playstyle so I wanted to keep it simple at first. So I went with a basic quad with bite and 2x claws for the evolution build. I wanted to keep the limbs to a minimum and focus on building those attacks up to their max potential. Is this a waste?
I may have messed up my build a bit. I'm level 5 right now and I'm using 3out of 4 natural attack evos with the 2 claws and bite I can't afford rake. Is rake important enough to lose bite?
Sorry for what might seem like dumb questions, but I'm hoping to find out if I need to ask my DM if I can change stuff or if it's fixable relatively soon.