Heres the dooblidoo, Pavillion is HEAVEN for EXP/Karma/Mats/Gold. Mass veterans monsters and plenty Champions boss events.
Heres a video of the powerleveling:
I suggest you find friends or random players and make a party, Tag as many monsters as you can, and you’ll get exp and loots from those monsters.
The mass people will clear them in a blink of an eye, just build your character with AOE damage and some defensive abilities/traits so you can evade and block some of the Champions attack but beside thakittens an AoE fest;)
Hope this post helps you level!