What type of marine would make the best sniper? We have sniper rifles for deathwatch. Who should use them?
A techmarine might be a good candidate. His imorove cover ability could help him make a sniper nest more secure.
A devaststor seems possible as he's all anout shooting stuff anyway.
The apocathery doesn't immediately seem like the greatest choice, but he can whip up some nasty poisons custom made for the job and he has other non combat tasks to do like patching his bros back up.