So I built a dex based human thrower assassin for kicks and its not the greatest, but it is a bit of fun. Any recommendations on feat choices. Pure rogue, currently level 12 and looking at:

1 Point blank shot, rapid shot
3 quick draw
6 precision
9 precise shot
12 improved critical: thrown
15 improved precise shot
18 ???
21 combat archery
24 improved sneak attack
27 blinding speed

Any thoughts? Melee is a last resort but still happens occasionally.