Alright.
We're pretty sure we have Firefighter in the bag.
Our 10 man Guild got it down to several 1-3% wipes with our main Healer and Guild Leader running with 2k-3k+ MS on the fight and just spamming hots and predicting damage.
He went away for a week for his work, came back and the internet is solid again.
Now in our first few attempts we were using Heroism in Phase 2 because it was healing intensive, but now the Healers are all good with Phase 2 and don't need it.
We used it on Phase 3 a few times and with only 2 ranged and 4 melee we got the head down to like 30% in one core with Hero.
Now, instead should we:
A - Grab 2 Cores before pulling the head down in Phase 3, then use Hero, he goes back up and then bring him down again.
B - Use it Phase 2.
C - Grab one Core, use it, kill the next bot, and then bring him down again.
What would benefit us the most?