I voted Other, because I think the limit of 3 options is ridiculous.
You need to do just about all of the above. The ability to dish damage isn't itself important, but that's often how you're going to get the enemy to focus attacks on you: by being a threat. Similarly, having high HP and saves (not just Fort and Ref, but Will, too) are going to be how you absorb/mitigate damage. Finally, while you yourself have to be a threat, you will absolutely never be the only threat: you're part of a party, afterall. So to deal with the enemies that try to get around you as a threat and attack the other threats, you need to be able to control the battlefield to some extent.
So yeah... just about the only thing on that list that isn't strictly necessary is the ability to dish out copious amounts of damage, but that's often something that kinda has to happen anyway.