My strategy is me sleep til 300% Tp rush in pull a self SC of Fragmentation (Thunder/wind) my self sc alone should do close 2 2K of damage and have BLM MB Highest damaging spell of Thunder/Wind and Summoners would hit Level 70 BP or 2hr Ramuh 3 times. That should do a massive amount of damage. The next few waves of Thunder/wind level 70 BP should kill it I would think. While I attempt like mad to blink tank it and stay alive hehehe.
Personally I think it should work the same after astral flow or level 70 BP the Avatar should bounce some hate with the BLMS and me until it is dead.
/em crosses fingers lol
Having a summoner in the mix may not be an issue so far I have all BLMS 3 70+ interested. Just need 2 more and we can get this party started.