Five posts in a row. Nice.

First of all, a thing that should help everyone who is going to plan for this:
Fire is veeeery heavy in B frame debuffs, and veeeery low in everything else. And the good stuff is basically all locked behind specific SSR Hime.

Now then, for my grand plan. As always, don't do what I do. Make your own plans.
I simply don't see myself having the Grid or the Hime to complete this Tower. I don't know if I'll even succeed in turtling 16F, if I'm right, I'll take 750 damage/t and heal for 660 HP/t. And this is if I am able to keep Culyune at 100% uptime, which means bursting every 5 turns. Well, Fire Mammon is there to help, but that still sounds like a stretch.

I'd also "love" to turtle 17F/18F/19F, since I don't think I am completing those without. But 17F first and second waves seem like they'd be a stretch to turtle, 18F and 19F both have DoTs.

I might revisit my plans for 17-19F once I'm done with 16F, but for now... nope. I don't see it happening.