Sorry SE, but endgame won't work if you don't fix something.

[Thotor]

I had the same problem but then I disabled Nagle and haven't had any issue with AoE period. I highly suggest people that are having problems with it to try that out - just google "disable Nagle Windows #" (# being your windows version)

Leatrix maybe ?
http://www.leatrix.com/leatrix-latency-fix
Not sure if anyone tried it for FF XIV