Monsters reset way too easily in this game. You can solo a lot of monsters without much difficulty by pulling them to their max range, hitting them a few times and then lose threat by backing up 5 feet.

Aside from that, it makes pulling monsters out of their spawn location to a safe location (ie a camp) almost impossible. Every now and then a monster won't leave you alone no matter how far you run but for the most part, a monster resets before you can get it to where you want it to be.

So my suggestion is to make monsters reset after a certain amount of time of running without using an ability on the mob. Its a simple concept that would allow for camps to be set up and have a puller instead of parties running where the monsters are.