On reliquary of souls i tank n spank first and third phase using frost
On the middle one I pop army as the adds die and pop gloves, pof nuke it down as soon as i take damage ams. If i drop to half hp raise dead, death pact. use next set of adds (if killed in melee range of u heal a huge amount of health) nice and simple
To be honest the toughest boss now in frost would be the illidari council those buggers do some pretty massive damage. But u should burn them fast enough for it to be a non issue.
I choose to do the place in frost, simply for the speed of it. Blood is unnecessary and really, really slow.
YES - blood is completely unnecessary in BT.
I killed IC in 21 seconds today, I forget how fast BB was but I had a whole 11 stacks of the bleed at the end...
For RoS, I go the lazy (safe) root for phase 2, auto attack, OB the shield when I have a KM proc (or DS), death strike otherwise