I was thinking mage, priest or warrior.
Mage is, with no doubt, the hardest class to bot.
Yes, they create their own food and water, but until they get their elemental, they are bait to almost any number of adds (one included). I levelled a warrior that at a time took 6 adds one level below him - thats SEVEN fucking mobs.......... Well, It was kind of unfair, cuz it levelled up after the third one died, else it would not have made it, but still ^^
I find the priest to be fairly easy to level. They can take a whole lot of beating with their vampiric embrace (15% of all shadow damage heals the caster), and if it gets adds, it will just dot all of them with vampiric touch, devouring plague and shadow word: pain, all of them contributing to the hp of the priest.
My current priest is level 73, and I am not afraid of letting it into crowded areas. I am not completely sure how many adds it can take, but I have seen it fight 5 mobs and survive.
EDIT: A quick note.
I think with the current folder structure, it is very hard for anyone not directly involved in the project to know where to start... I mean, of course there are the starting profiles, but after that the user is presented to 13 different *.xml-files. Of course, you can guess which to take by the level, but some of them are overlapping.
What is the deal with those two files going from 12-26 and 12-80 respectively? Which one should you take? And what about the profiles that TWKing created? Are they to be taken instead of the 12-80 file, or are the quests in those already merged? Or should I chose something completely different?
Whew... Also, the first post should, in my opinion, be more descriptive and with more information about the current progress, you certainly are not getting a lot of new helpers in with that introduction ^^