Looks like lack of skills points?
Rapid schot - max with passive dmg - 11 sp
Tripple schot - max - 9 sp
Cripple schot - max with passive dmg - 10 sp
Sekond weapons - 4 sp
No dmg buff (only 45*1.2 = 54 dmg)
First tree till Pure - 4 sp
Sekond tree till Deep Wound - 5 sp
Range - 2 sp
Spirit & Inprisonment - 2 sp
Enchanced - 1 sp
Restriction - 1 sp
well, and only 1 sp for chi left... but you have all dmg skills with pretty low calldown maxed and all debuffs.
so as i know its possible to get extra 5 sp whitch you can spend on chi and maybe lvl 2 of Enchanced or ice or critical buff.