As a healer how do you help under geared tanks?

[Foo01]

I would say keep adlo up all the time on the tank, but I'm not sure if it's available at that point due to level sync.

If I was using my SCH, I could give that a try, but I don't think it is available/allowed at level 32.

Additionally, I was using my CNJ/WHM trying to get to 34 to unlock stoneskin, so that was not an option. I did apply "eye-for-eye", but that has such a long cooldown.

BTW are tanks supposed to dodge AOE? I can't esuna them fast enough and still heal, when they stand in stuff can picks up 3 stacks of poison.