Now I'm done babbling about how cool it is...
While I agree that a mage would be cool, I love how you have avoided the typical stereotypes of FMTC/FWSR (Fighter Mage Thief Cleric) / (Fox Wolf Skunk Rabbit). I think it would be cool to stick with the group you currently have; it has a great amount of potential, and it stands out as original.
I would personally like to see more of the bard; the part with the lute made me laugh quite a bit, and it reminded me a lot of the group's adventures in Glenn's campaign, which was cool.
Question; How often is the strip going to be updated? I heard you talking about once a week before, and that would be cool, but it is up to you and even one every fortnight or whatever is good too. It's up to you I guess.