from a quick look at your data i agree that you've got to improve your max speed and your first lap time - doing that will save you seconds on your opening lap and a second (or more) per subsequent lap.
since you have power on your road bike, practice standing starts (with full rest between) in a variety of gears. track your power, cadence, and speed, and see what works for you. experiment with larger gears.
most roadies are used to sprinting in a very limited cadence range, but you've got to get used to rolling up from 0 to 130. so practice that.