The 4th boss in dragon soul, Hagara the stormbreaker is supposed to be tanked by two tanks.
Taunting at each and every Focused assault. The ability focused assault will kill you if not the other tank taunts the boss.
But here's where the trick to solotank here comes in, when she starts/finished casting her Focused Assault attack, just strafejump backwards, this will cause the boss to stop casting the ability and she will get "cooldown" on it.
So far i've only tried it on LFR since I haven't found any groups for the normal one... Might even work in normal/hc.
You will probably say "Uuugh it's the worlds most retarded and easy boss, atleast in LFR".. Perhaps it is, but those times when you get into a group with a completely retarded tank who doesn't know anything, this trick will come very handy..
For those of you who can do this boss on either HC/Normal, feel free to post the results.