It's pretty silly that a game called "Achievement Unlocked" does not have any Kongai achievements associated with it. If you're going to bill this as "totally meta" then surely it should tie into the meta points system here.
Careful use of Artifacts is key here. What is most interesting about this is how you can set up some heroes as "support" slots for others: for example, if you prefer not to use the Barbarian, you can set his artifact slot to the Rune of Revenge so that you benefit from his artifact no matter what hero you are on. This leaves you free to play as something else, without wasting a slot.
 "Achievement Unlocked 2"){kind=icon}
 "Vertical Drop Heroes"){kind=icon}