You will definitely get this through normal play of the trilogy, as this achievement is cumulative across all three games. However if you really want to boost this, you can quickly run into battles by running in and out of houses that are facing opposite each other in Skara Brae (the town in the first game). Just spam the up button until the battle triggers. You should be able to get away with regular attacks on all characters and maybe some spells from mages, though I don't recommend doing that if you're lower than level 5.
As it's a PlayAnywhere title, I strongly recommend doing this on PC as the keyboard shortcuts in the battle menu's are much faster to input during battle than the controller menu selection. Although the keyboard works on the Xbox One version, they keyboard shortcuts do not.