I always got far more power and speed out of crossovers than anything else. Cutting inside the corners and outside the straightaways on an oval that small means never having to go straight.
Learn the crossovers...Love
the crossovers, makes one far more nimble...which is really handy for dodging the new munchkin skaters, and random limbs of skate dancers. I expect the same thing would be handy in derby too.