While I agree killing it is killing it. I disagree you shouldn't strive to do it better, more efficiently. My first T12 kill was with 5 Bennu, now its with 3. As you know 5 Bennu takes extremely good players to pull off. 3-4 Bennu is PUG material. Huge difference in difficulty.
T13 - Megaflare is your biggest MP sink, skipping them really helps healers. 4 Flattens really line up well with CDs.
Adds phase is fixed so nothing to report there.
Last phase the goal is 4 Ahk, I'm not sure 3 is possible, but 3 would ideal and allow PLD to stay in Sword oath for the entire phase. PLDs already sword oath during the first and second Ahk. Moving PLD HG up to the third would be ideal.