As said assign 1 dps to break ice blocks and a second on backup incase the assigned person is the IB target.
You need dps on her the longer this drags on the more likely you are to fail. Can I also say you are extremely
caster heavy usually its melee that does the IB breakout as they dont get unchained magic.
Preferably the iceblocks need to be closer in so melee and tanks dont have to run as far. You need to be careful
with head placement but both definitely closer.
All the range and healers should be stacked up tight to not get in way you are spread out all over place like you are.
** Remember Warcraft players fail in directions you never thought possible.