I run Rotor cranks on a Trice Q and find them useful in climbing, but not enough that I have put them on my Rocket.
In general, I think you will find that you want to increase your cadence while riding a bent and get used to applying power throughout the stroke. If my pedal stokes are not smooth, that's a sign to shift down and pay attention.
The bent equivalent of rocking is, I think, bracing back hard against the seat. You can generate an amazing amount of pedal pressure that way, certainly enough that one's knees threaten to explode and create an embarrassing display of debris on the roadway.