I live in Australia and play on a Japanese server as they're nearest to me. My internet connection speed good and I've never had a problem with online games even when I played WoW on an American based server.
Final Fantasy on the other hand makes me feel very embarrassed and stupid in dungeons.
I'll give the last boss in stone vigil as the example. He casts his AOE as a circle around me. I'm on the other side of the room when he finishes the cast and it hits me. Every time. I run the instant it appears. I had the same problem with Titan's line AOE, was miles out of it, got pushed off the edge.
This means effectively that I can struggle through the story dungeons but will never be able to play any endgame as I'd be a handicap to the party. Does anyone have any suggestions on how to mitigate this? I realise the answer is probably no but there must be Australians that make it to end game, do you get this terrible latency issue?