Yes it's not bad, just as example from all the ops bosses parses on storymode avarage 75% (so slightly better half) does 8107 dps, while others like sage 8043, commando 7800, scoundrel 8500, gunslinger 8100. So its right there with the others, the best 99% of the parses are shadow 12k, commando 12k, sage 13k, vanguard 14k. There is no reason not to play assasin dps if you want to.