For the IoC Allstar achievement that requires you to Kill a player, destroy a vehicle, assault a base, and defend a base in a single IoC, can be done a little easier than intended with the following method:
The only thing required for this is a "soon to pop" Wintergrasp.
- Make sure you are q'd for WG.
- Around 7-8 minutes before WG starts, join IoC. (The reason you don't want it to be any longer is because you do not want the IoC to end before WG starts)
- Complete as many of the objectives as possible in the Allstar achievement before WG starts. The more you do, obviously, the easier it will be. (I reccommend assaulting a base and trying to defend one)
- When WG pops, take the q. You can either play WG or immediately re-q for IoC.
- Finish what is left of your achievement in the new IoC.
I have found that when I take a WG q, it does not register as me leaving IoC, so the achievement does not reset. This allows you to do the achievement over the course of 2 IoC's instead of one. I'm sure it would then also work with AV Allstar ect, although I have to wait another 2 hours to attempt to find out.