Sprinkle in some 20-30 second sprints at your target pace during the warmup. The key is in the first 2-5 strokes/rpm - big power with extremely quick recovery. Keep the drive tight and full and stay in control. Use the 2:00 rest periods to gently recover, it's good to move rather than staying fixed.
Accessory
4x30 banded pull-aparts
3x15 SA banded pulldowns
2x15 HR push-ups
1x15 SA KB bottoms-up press @ 18-poinds (failed after 12 on left arm)