Succor for t13 megaflare?

[Sleigh]

We'd been at t13 for 6 weeks and weren't making progress (hadn't seen terraflare). I am a smn with 5975 hp and our blm had about 5950 hp. Sometimes people (even the monk with 6500hp) would randomly die to the stacked megaflare and I told the sch to use a succor.

Dragon Kick
Storm's Path
6K on casters, 6.5K on non-casters
Succor
Sacred Soil

You need at least two of these things. 5500 HP on casters and 6K HP on non-casters is fine but you need DK and SP up to consistently survive. People honestly exaggerate how much HP you need in T13 if the debuffs are up and people don't mess up, though more HP definitely keeps it lenient on how topped off people have to be for every Megaflare and other select times (final phase Mega > tower, tether hits, Rage with 2 stacks), though all situations an i110 HP player would die SCH can make sure they won't.