To help out when healers/casters are in trouble, scouting of rooms ahead, bringing adds on the loose to the tanks, notice others overagroing, pickpocket trash in raids, if a tank dies taking over and evasion tank
To bandage up all the netherweave cloth ive grinded. Yes check your healing meters, rogues are top healing dps class
And ye oc to pwn the damage meters and vanish and get out a life when theres a wipe

Shht Day dont tease the shadowpriests they might dot us!! And think about the fact that even with an instance full of undeads rogues still pownzorz!!
Did i mention unlcoking chests!! Altho i still prefer telling i didnt bring my thieves tools , to get back in later and loot it Muhahaha