I was a little confused by some of these rankings until I noticed something. Do you count non-combat utility in your grading at all? I'd have pegged the Ranger at a higher tier because they had extremely wide skill use, good utility spells including speak with animals, dex focus and access to thieves tools alongside respectible single target damage, crowd control and survivability. It's a lot of utility even if the amount of times that translates to help in combat is potentially somewhat limited.
