Half-elf Rogue 18/Bard 2
S 8
D 16 + 5 tome for combat archery
C 14
I 18 + level ups
W 8
C 8
1 not sure dilettante matters
1 rapid reload
3 point blank shot
6 rapid shot
9 precision
12 improved critical ranged
15 precise shot
18 empower healing (for cocoon)
21 overwhelming critical
24 improved precise shot
27 combat archery
Non FOTW AP:
half-elf 1 ap (human damage boost)
harper agent 8 ap (kta 3 ranks)
mechanic 37 ap (sharpshooter, rapid fire 3, mechanical reloader, fletching 3, int +2, leg shot, expert builder)
assassin 23 ap (killer 3, crit master 3, sneak training 3, int +1, damage boost 3, venomed blades 3)
swash 8 ap (doubleshot boost 30%)
acrobat 3 ap (run speed)
Doubleshot during boost (stack human damage for +20 RP with doubleshot):
10 rapid fire
20 killer
30 boost
10 feat
9 past life primal x3
8 skirmisher's bracers (easy to get example)
2 guild boost
----
89 doubleshot
If repeater really gets doubleshot on every bolt you will have a lot of 6 shots....
If it doesn't then that may favor greatcrossbow at those insane doubleshot levels.