The game in general seems kind of easy to exploit.
You know the Dragonbane Seed DLC thing? A game breaking thing with that is using the Samurai class and Cyclone Dance. Normally with the Dragonbane Seed enemies they receive 1 damage per hit, meaning that with most attacks you'll only be able to inflict one or two hits at a time, and consequently increase the odds of them escaping. Cyclone Dance hits targets multiple times and it hits everyone, with each upgrade increasing the amount of hits. You also get it as soon as you make a Samurai, so there's hardly any grinding, baring maybe buffing it for maximum efficiency.
Also you can replay this particular DLC multiple times.
With this in mind, you can gain levels and skill points at a very ludicrous rate and basically make the game a cake walk.