1. Fighting waves of weak enemies-
I think I'm gonna have to use the Zerg Shotgun song for at least one of these (Probably won't have more than 2 of these wave type attacks). That song is just awesome, but so are a lot of the jukebox songs.
2. Boss fight-
For a boss fight, the lost viking boss fight music is pretty cool for a robotic type boss. But there could also end up being a "witch" boss or something, in which case I don't think that music would work well for.
3. Town music. As in everyday music for when the player is between major storylines/quests-
4. Death of a friend/loved one-
5. Spooky music for a possibly haunted type area-