Just putting my 2 cents on this, and only my opinion, not the opinion of those in charge!
I am thinking we should try reverting back to the strategy where we do our main burn after her first port downstairs. There are fewer tentacles, and from my experience, get hit with enfeeblement less often. As the event progresses and we get more tentacles, melee are having a really hard time getting near the boss, and reduce our dps substantially. Not to mention that as it goes on, more deaths which farther cuts into dps. On many attempts with burn being on port back up, I have never really been able to get a main burn on the boss due to either a death or too many tentacles near the boss.
Maybe try melee burn on port down, ranged burn on port up? Just feel like melee aren't getting utilized well by waiting to use our burns until later in the event.