Needs more work, scaling is too low, killing 30 npcs in 12 hours isn't hard, i can trump 200 in a day, others 2000 a day, and gaining 2000 xp from completing "challenge"? low rankers can jump 2 whole ranks with 2000 xp.

You have one week to kill an elite npc? wtf, killing elites are meant to be killed by 3 people and they expire in 24 hours, so how does that challenge even work?

They are ideas only, of course there will be flaws. As for scaling, I'm only rank 78, so I wont know how many a high rank can get through. I can only get through 9-10 a day, and it takes me 3k+ to rank up.