Quick rundown of the strategy:
3 Tanks, 5 healers (3-4 full time, 1-2 dispelling), 17 DPS
P1: Two ferry tanks (me (MT) and our main OT) and a third OT that stays with the raid next to the door. 4 DPS'ers finish off the adds next to Sara. We pop up an additional Guardian at the beginning. Maybe we could pop up a 2nd since sometimes we're waiting around for the next Guardian to spawn.
P2:
Brain team: 8 melee, 1 DPS, 1 heal. They get every single stun usually in the 15-18 sec range. In between portals, they only regenerate Sanity if needed, otherwise they just wait for the next brain phase.
Upper Floor team: everyone else. If there's any non-tank melee, they focus on corruptors with the off tanks. I joust crushers. 2 DPS and myself focus on Constrictors.
Issues: Crushers go down with around 12-20 secs left on Induce Madness, which doesn't give us a big room to take down Corruptors. We usually enter P3 with no crushers but 3-4 Corruptors up. Healers DPS during stuns if possible
P3:
We enter P3 in three brain phases (doing roughly 32% brain hp in the first two and the remaining 6-8% during the 3rd phase after I tell them to do so).
Every melee: Focus on Guardians (I guess we can cut this down to 8 melee DPS on the immortals). Everyone else in Yogg.
We tank the Inmortal Guardians in Yogg's back if possible (yesterday last Crusher spawned in the front, which forced us to stay there since I didn't want to risk moving the raid during P3).
Issues: Proper rate of Immortals going down? 1 at -50% hp and a second one alive is good enough, fast? 3 in the range of -33%, -66% full health?
After some time working on this, we finally got to P3 on our last two attempts flawlessly, but in P3 I know I wiped my raid due to poor judgment. We had roughly 5:30 left on the enrage when P3 started. at 3:00 Yogg was still at around 22%, when I decided to swap some melee to focus on Yogg and aoe to keep the guardians at bay (which didn't work out since noone was really focusing on them besides tanks and they quickly both overrun us and healed Yogg during a SB).
So, any friendly advices out there I can take? I believe that 8 DPS on the immortals should be enough to keep them at bay (should take around 10 secs to bring them to 1%).
Thanks!
EDIT: In case anyone wants to take a look at: Here's our WoL for yesterday's raid. We wiped a few times on Vezax due to lack of proper interrupts with two melee new to the task, and one of our mages stealing aggro twice. Our raid dps is probably a little lower than it should, and apparently, if I'm not mistaken, WoL doesn't record Brain Room dps.
World of Logs - Real Time Raid Analysis