Update: The one rule for both didn't work out so I'm back to two rules.
okay...I did a bit more testing and I got them down to two rules.
The trick with the dryer was to find out how much wattage the dryer used with the door open. This included the control panel and the light bulb being on (15.338 watts). I hadn't thought about this before and wondered why I'd get notified it was finished even if I just opened the door. That led me down the private boolean path when I should have gone down the wattage path.
The washer rule really came down to the delay. My washer does a bit of maintenance after the final rinse and I wasn't accounting for that.
