What is your average ping lets say on retail, connecting to EU servers?
Fun and rough math:
Sydney, Australia to Paris,France - 10500 kilometers. (21k back and forth straight)
Lets assume you connected straight to Nostalrius PVE with fiber cable, right from your computer into their server, skipping all hubs and etc.
Knowing the light speed and distance we now calculate that light will travel ~21.000 KM for about 70MS.
Admit, that 70MS is the time packet need to travel from you to the server and backwards WITHOUT even being handled by your hardware/isp/hubs/nostalrius and so on. And don't forget to add the time needed by server to receive/process/send your packet.
Imagine your packet travel from you to some sort of cloudflare server located in lets say somewhere in US, than travel to WoW server and after all this adventures travels back the same way. (I'm not saying it is working, it is just an example)
To give you an idea of what the result be, my average latency to Nostalrius pvp is 30-50ms. Connecting from Moscow with an fiber cable from straight from my house.
So for me 300ms is pretty reasonable, however this math is super rough ofc
(By the way, calling ISP and asking for a "tunnel" worth a try. (Don't know if its ok in Australia to do so))
I'm now interested what latency have your fellow citezens.