need help with build

ive chosen to make a ra/earth el with expertise, marksmanship, wilderness survival, and earth magic. my job would be to create chaos with my arrows(special effects like poison or exploding arrows) and traps and use aoe and pbaoe spells. what would be some good skills to pick up?

Preparations since you'll be leveling wilderness survival, and you'll like conjure earth. A quick reminder though: you can't have everything. If you were hoping to make the flexible ranger that can adapt to any surroundings, you've been forewarned that those are incredibly impractical -you'll have party members to deal with various situations.

ok, what skill trees could i give up for the job i want to do? or should i give up a job of my character?