40-50 is more about how broken grinding is in this game now. At that point, it's not really a PL, sicne it doesn't involve any underhanded tricks. AoE rage grinding is just the way to go at 40+, and it works all too well. The other issue is that sometimes not doing it can really spell your doom, based on the came area.

Not being fast at kills with the new 2 minute pop system can become a big issue. I think SE needs to look at rebalancing a bunch of elements if they want to really try to curb what is going on. It's not as simple as just changing the claim system or xp equation.