Is it possible to fit 3 step mudra completely between GCDs?

[Darkstride]

But you turned 240 potency into 360. Raiton does that without the critical, without requiring the boss stays in the whole time, or lives the duration of the dot.

I don't think anyone is debating that Doton is better than Raiton in single target scenarios. Doton, especially with Kassatsu, has its uses under AoE conditions.