Its actually great for pvm in its original incarnation both in HC and SC. My proposed build is an experiment of sorts. If you want straight up pvm I'd probably choose multishot or strafe and up that (i prefer multi just because I hate strafe lock) instead of guided arrow and/or also take some points and pump them either into valkyrie or your defensive passives depending on your style of how well you use meatshields. I've never found GA to be useful in anything other than PvP and boss monsters and if I'm using a single arrow I'm probably using freezing arrow rather than GA anyways.