For those that want a few sneaky tricks to add to your Warrior rotation.
I'll list a few i'm come across & discovered, and I hope you'll add your own so the community can use it.

the Pug ability "Second Wind" is a skill base on Attack Power. So if you up your Attack before using it you get more out of it. Also like any other heal it is subject to determination & Critical Hit Rate.

While you have no skills to up determination you can also borrow the PUG skill "Internal Release" to up your critical hit rate by 20% for a short duration.

Add to this Wrath 5 and your Critical will be up by 35% total from just those two abilities.

All that is to say: For a High potentially Critical heal from "Second Wind": use Berserk+ Internal + Wrath 5
I've gotten a 1100 Critical Heal once @ Lv 50.