Try Mudfish. I got Oceania realms down to 110ms or so.

Quite easy for me. There are two different method but pay by usage is the better option for mmorpg players. I have only top up USD3.00 once, used it few months ago for several days during the same lag period, and still have USD2.70+ left. MMOrpg data usage is not really that much. And USD3.00 gives you like 30Gb of data quota. Unless you turn it into VPN, only WOW data usage is counted towards the usage.

You can always give it a try, it will give you USD0.07 worth of usage during trial period, which should be good for quite a few hours.

1. after you login, by default you should be in dash board mode
2. go to item menu and choose World of Warcraft to equip it
3. click on the World of Warcraft item will open another screen for you to configure. click on setup.
4. from setup screen, you need to set your server location. For Oceania realms, just choose Oceania.
5. From the Node option, you can let it auto select, or choose a specific node. In general auto select is fine it will determine for you. Choose basic mode, don't need to use Advanced.
6. Turn on active status, and then click Save.
7. Go back to dash board screen.
8. Run WOW, your ping should decrease as Mudfish take over the routing for your game packets.

by the way, if you decide to top up, remember it will charge you sales tax by default. But you can type in request to ask for tax refund since we are Malaysian so not subject to their tax laws. The refund won't happen immediately. But someone will eventually respond and add extra credit back to your balance. As of now due to refund I have actually USD2.97 in the balance.

How about FPS games like Overwatch? Tempted to try mudfish