Did this on 25 and 10 man.
On 10 you do as the video says.
On 25 you do as the video says, BUT you will have to turn around and damage the dwarfs maybe 1 or 2 times WITHOUT killing them. This will give them much less hp, and that makes the achi much easier.
Great guide, have thought about trying to solo it before, but never thought of how
Thanx, and +rep (dunno if it will affect while I'm still Leecher tho)