My WAR & the two aspects to make you tank effectively!

[Lhun]

Mantra (and Convalescence) only effect "curing magic" and Mantra accounts for +5% HP recovered when being cross-classed. It has a 15s duration. It's rather pointless to use Mantra alone; stacking it with Convalescence, which would be 2 cross-class slots, grants a +25% bonus to curing magic for 15s, +20% for 5s - a negligible gain that requires proper timing and macro sequencing by the Warrior to be of any use.

Incorrect. Convalescence's text says: "Increases HP restored by spells or actions by 20%." Try it and see! Use Convalescence (EDITED, AND MANTRA) with second wind (after zerk, unchained if you want) and... EDITED - I was incorrect. I just tested this, Mantra may only affect second wind, if anything.

Also, I have zero issues with "proper timing and macro sequencing". It's really easy to press 1 button to add the stacks you need/want (macro together, so that if the others are not off cooldowns they're ignored) then press the second hotbar button.

I USUALLY use inner release instead of Mantra. The chance to crit inner beast/second wind/anything else can just be too awesome... but awareness might even be a better choice to stack with foresight in the long run.

Featherfoot seems pretty useless over all. It's just a chance.