I do not know if its intended or not, but there is an issue sniping with Vivisection where the person you are sniping sees you. AS being one of the 3 survival prime guilds the other two do not have this issue. When they snipe it is not seen. It doesnt matter the contest, the person who is targeted with the spell will always see you. I was hoping this could be fixed and fall in line like it should with Thieves and Rangers.

Totenus