EDIT: The Lunar Revel is now over and these icons are no longer obtainable.
Some of you might be strategizing on the fastest way to get the Lunar icons, and no doubt many of you have already figured it out. In case you're wondering though, the fastest (and most efficient way) is as follows:
1. Figure out which Lunar Revel Skin you want;
2. Find a friend who also wants a Lunar Revel Skin;
3. Both of you gift each other $10 of RP (Icon 1)
4. Each of you gift each other the skin you want (Icons 2 and 3)
5. Play a 5 man pre-made (Icons 4 and 5)