So you can think of tri-disaster as saving you 3 GCDs over the course of 30 seconds.

Eyeballing dot casts, assuming 100% uptime, if you RS > bio II > miasma > bio, you'll have bio II up at 2.5, miasma at 5, and bio at 5.5

Assuming we will tridisaster at 19.5, you end up having

Bio II 17 duration, 13 clipped
Miasma 14.5 duration, 9.5 clipped
Bio 14 duration, 4 clipped

Purely looking at GCDs saved, you end up losing 13/30 + 9.5/24 + 4/18 = 1.05 GCDs of value.

Er, its an odd metric but essentially what it means is it saves you one less GCD than usual. So we now calculate whether thats worth it.

As opposed to letting dots run out, we gain

Bio II - 17 seconds
Miasma - 14.5 seconds
Bio - 14 seconds

So we get 17/3*35 + 14.5/3*35 + 14/3*40 = 554.16. So with 20% RS it will give us 110.8 potency. Since a normal GCD is roughly 80 potency (as we'd never skip dotting), this is worthwhile, with a net benefit of roughly 30 potency.

So the problem is, will it be more useful instead of we used it at the beginning of RS?

Or rather, is it better if we use it when dots are all ticking down?

So assuming instead that we merely want to save GCDs during RS (3 GCDs, to be exact), we'd actually only gain 2 (since 1 last GCD is used to hit a bio right at the end of RS).

2 GCDs of Ruin during that phase will end up being 32 potency greater (due to RS) so actually depending on dot timer sync ups this is the same as trying to do the whole tri-disaster at the end thing.

I'm not a fan of pre-overwriting dots. I will always wait until dots are <5 seconds and mostly sync'd up before reapplying.

RS provides 7-8 potency/3 seconds, while reapplying a dot early results in more than that.

Also sorry someone asked a question sometime yesterday but I hit post cap, whomp whomp.