Duuuuuuuuuuuuuuuuuuude!! So during my lunch break I figured I would just give this a quick try so I don't have to fuss later tonight when I play with some friends. I went with Ballistics and Custom Engineer, put on sentry + missiles and cluster shot + missiles. Within 5 minutes of playing with it, this fucking quiver dropped, http://us.battle.net/d3/en/item/bombadiers-rucksack
Now I have 5 missile firing sentries. It is insane. My build just got way more fun/awesome.
Haha wow, that is insane. Grats on the drop, I can only imagine how crazy it is!