Sheer Force question.

I got druddigon with sheer force ability.

I got Crunch 80 power or night slash 70 power, but critical hits land more easily,

I was wondering if night slash gets the 30 percent boost from sheer force making it 90ish power, since it has secondary effect with critical hits land more easily. Or should I just use Crunch? Sucker punch is best, but mines don't have it.

Nightslash gets the boost, basically any move with a secondary effect gets a boost so you'd be better going with Nightslash. Also this ability allows you to use a life orb and not take damage which is cool!