Baldric wrote:
Charisma is important if you join a tribunal because it will allow you to order certain tribunal guards that you otherwise couldn't. It will also decrease the lag you experience after giving an order. Charisma is also essential for any melee class in the Hammer of Light (unless you are a griffon, but you're not), but it is against the rules to discuss why here, so you'll have to take my word for it.
I also really like having wisdom high, either naturally or with mods. In the limited testing I've done, it will help out a ton when resisting charm person, which is the most devastating and OP spell in the game. Also, if you join a cabal that has a spell you want to hold, wisdom will help you hold it longer.
I need to jon stewart you one of these days.