This is not a difficult fight to heal once you get over the initial omg-lazers-and-stuff-everywhere! panic. The "difficult" thing is to understand that people will get hit by unavoidable AoEs but that's ok as long as healers know to prepare for them. My issue with this fight was that I was focusing too much on AoE heals (because I was panicking when everyone was at half HP) instead of keeping tank topped up for the big move which resulted in both our tanks dying multiple times during our first victorious rung. Still, the fight is easy and we were able to recover from all of the deaths without many issues. Nothing in the fight is very difficult to evade even though it may feel scary at first.
So for healers, just precast AoE heals and regens so that you know all DDs will be safe and make sure to keep your current MT topped up for the big hits coming every minute or so. And don't panic.
