Reminder that war is still good.

[BarretOblivion]

Not in a raid setting, more mitigation>than some small heal you get from your OT. More mitigation means you don't have to use as many cooldowns. 20k hp is the value of a what is basically 1-2 basic attacks from a boss and that is iff you set up for a "big heal" with inner chaos and a upheavel to weave so you hit enough to heal that much. Most of the time you aren't going to be setting up deliberately for a heal and it falls to about a 12k heal which is maybe 1 basic attack from a raid boss a 1/10th of your hp. Equilibrium is an OGCD that is an instant heal that can crit up to a 40k heal. Nascent flash ignores crit/direct hits and is a flat heal amount.
There is a difference between maybe a 1/6th (or 10/th) of your hp and 1/3rd.
Its not something you care about or think about because its not enough to consider. More mitigation for OT is what most people will consider to save cooldowns.