Why are you not a tank?

[Amyas]

As a war, all I can say is spam overpower for your first few gcds in a pack. Buff up, overpower, use enmity combo when around half TP and steel cyclone and flash. You'll keep hate. And you'll be able to adjust how many overpowers etc as you go along and get a feel for the enmity each job pulls and such.

EDIT: Tanking, especially as a war, while keeping hate and doing as much dps as possible, is incredibly fun. Once you get the hang of it of course.