Rook's Shoulder upgrades useful?
Hey I have been playing around with the Rook for a few games now, but one thing that I just don't see doing that much is the Rook's Shoulder upgrades. Yeah they seem to do some damage, but it seems to me that the point would be better in about anything else. Or maybe it's just that I don't really see how much they really are helping or not.
So I'm wondering do you guys find the Shoulder upgrades useful? Why or why not? Also I have yet to get the last upgrade, the one with the poison arrows. With only 10%(or 15% I forget now)chance of affecting someone does it really happen that often to be useful?
Thanks