Changing these from "kill it once, never bother looking back again" to something that might reset weekly would be nice. Items would level with you (i think they already do depending on your level when you kill them). An increased chance of getting AP per kill at higher levels would be good too. Same odds of AP but adjustments for chances of higher "tokens" could be an alternative too.
When you are max-level, World Quests will show up asking you to kill rares you may have already killed while levelling. These rares will be buffed with a random, kit-appropriate affix (or two or three), making them much more difficult, but also more rewarding.
