I wanted to make a Fighter / Weapon Master build as I had a lot of fun playing one in the original NWN. However, a lot of the enemies in Mask of The Betrayer are undead and therefore immune to critical attacks which makes a weapon master build less enticing. So I decided to balance out the build by adding a level of Cleric for Divine Vengeance, which adds +2d6 divine damage to all attacks against undead, and I polished the build off with levels in Frenzied Berserker, both for the extra attacks from Frenzy and the enhancement to power attack so I could artificially beef up my non-critical damage without having to pump too many points into raw ability scores. It makes for a pretty cool concept character.