Given that the task is 25 revenants, it's basically a 5 minute task. I understand there are PKers but rev imps are level 7 and have 10 hp. Meanwhile, they can drop items worth 10m+ (yes its rare, but even the rune items add up quickly there, and the emblems too) - it's part of the risk/reward system in place.
I agree that this should be implemented. Given that we're a private server, even removing the cap isn't a bad thing. It would allow people to stack them for some content on YouTube or whatever too