Best way to get rep?

[Talizen]

I know for the staff, a real quick way to get up to around 15 to 20 is to go out to Kingshead, then run into the yard into the middle of the squad formation, then blast them with 'Wither'

Keep doing this over and over until you are either a) dead, or b) the level you want to be.

Fireball works really good also in this way.

Oh yeah, one more thing, talking to the NPC's while in battle is a good thing. Simply pay the 5gp for healing, then you can continue on!