Back when I was a solid skater (hence the handle), I could keep up a good speed on my skates. I even passed a guy on a climb, I mentioned it was my first time passing a bike on my skates, he said it was his first time being passed. The gearing on skates uphill is the worst.
The only challenge I had when the super rare drafting occasion occurred (like twice in 10 years) was that of how to keep from crashing into the cyclist as I was pacing him if he slowed a little. Bearings in those skates are super efficient, and the worst drag would be rolling resistance which is better than a bike due to the solid poly wheels except over rough surfaces. So the draft of a steady biker is a dream for a skater, especially upwind!
I'd recommend telling the drafting skater to go ahead and put a hand on your back if they find themselves gaining, it'd be to both your benefit, and definitely better than the skater braking or standing up losing some draft to keep from crashing into you. It's relatively easy for a solid skater like that to end up straddling your rear wheel if they find you to be stable, and you don't have cargo there. I know both times I had a chance to draft someone, there were moments where I wish I could have just given them a little push to keep from crashing into them.