[Faceman]

There's a lot of one on one action in the game, or monsters that spawn on commandand get more difficult each time (this is especially heavy in WK)
So let's recollect:
There are pit fights:
1.) At the CC: for your PC AND for Mazzy
2.) At the Druid Grove
3.) At the Sahuagin City
4.) At the Illithid City
5.) At the Ust Natha tavern (two different pits)
+ some in ToB

There's monster's spawning in a "battle-game" on several occasions (e.g. Spellhold maze).