I got my team of hunters to 15 and decided to try Deadmines - we got absolutely wrecked, thanks to my pets not being able to get group aggro.

So, went out and quested to get to 16 and got greater fleshrippers and then went back to DM. What a HUGE difference!

There were a couple of wipes - some rooms have a LOT of mobs in them and they are all chained (or at least, difficult to pull alone). I was able to kill the first two bosses without wiping on them, but then at the 3rd boss' room one of my pets pulled EVERYTHING IN THE ROOM and at that point I figured I was done. Managed to get to 17 in the instance a little before that 3rd boss' room, have a little gold in my pockets, and will be trying the instance again when I get some time to play.

Fun!