I'd prefer Intimidate even if EarthquakeSpiral was on Dragon Dance + Outrage Salamence.
The extra survivability is amazing on something weak to SR. DDMence doesn't really NEED more power either, does it? And MixMence wants Intimidate so it can come in more...
"'Let me give you some advice, Captain,' he said, 'It may help you to make sense of the world. I believe you find life such a problem because you think there are the good people and the bad people. You're wrong, of course. There are, always and only, bad people, but some of them are on opposite sides.'"
— Lord Vetinari, Guards! Guards!