Hey Dravic !
This is exactly the build of my Xbower. ( 15st , 27 agi , 14 conv. , 4 ps , 4 athl. , 9 wm )
He is only lvl 28 now, but it works already. And pretty well.
Now he has 160 wpf in xbow and 76 in pole. My aim at lvl 30 is 160 wpf in xbow ( it´s enough for me ) , and 114 in pole.
What is after the patch i will look , when it is there ...
But the build is very good. You can use Sniper Xbow and aim pretty good with 160 wpf. I use a Long Hafted Spiked Mace as melee.
Btw : I use only 1 slot with steel bolts cause reloading is soooooo slow. 15 bolts are enough for me. I like to run around with my team too, helping here and there with shooting or switching to melee as support inf. But your on the right way with this build ...