I want to try tanking, but I don’t have the play time hours to try all 3 to 60. I’m not necessarily looking for the “best” tank, because I assume all 3 can perform at any stage of the game. I am, however, interested in the advantages and deficiencies of each job. I want to know which tank …

1. Generates and maintains the highest threat for single target and AOE?
2. Has the highest physical mitigation and magical mitigation?
3. Has the most single target and AOE DPS (while tanking)?
4. Brings the most useful buffs/utility?

On a side note, what is the most preferred tank duo combo for end game raids?