If there was a class chart for bossing/1 vs 1/mobbing.

Having clean equips excludes the differences that scrolling brings to each class. Not to mention the differences from potential (for having more or less potentiable equips).
It would also be unrealistic and meaningless.

Also, what do you mean by "mobbing", F/Ps would be the best given a big enough mob since DoT has no target limit.