MPG+, Welcome to our forum and kudos to you for your efforts.
When I refer to " Pulse and Hold " I'm trying to describe accelerating to a target speed and then maintaining that speed with as small a throttle opening as possible. "Pulse & Glide" would describe accelerating to a target speed and then coasting in neutral or with the clutch in with throttle closed and the engine either idling ( ICE-On) or shut off ( EOC ). The coasting would be maintained until the speed had dropped to the bottom selected , then to be accelerated back to the target speed , repeating this cycle for optimum fuel consumption. Driving with Load refers to maintaining the throttle position on the flats and going uphill rather than accelerating to maintain the cruising speed. I hope that clarifies my the actions I'm describing. Others, please feel free to correct this statement or expand on it if I have misspoken.
For the uphill scenatrio you describe I would maintain my throttle position and bleed off speed as I climbed to the top , even if I had had to downshift , with just enough speed to be safe for the traffic conditions and then let the potential energy of going downhill accelerate me back to either my target speed or let me take advantage of an extended opportunity to coast in neutral. I hope this helps.
best wishes, L&S