I decided to kick my sickness' ass today.
I made sure I was warmed up and tried to play a more "mobility limited" style due to not being able to use much energy. I did much better than most of the week. I got my fair share of block and push points instead of just pure attacking. The penholder I play with has learned a low, short, pretty heavy backspin serve, and I had a lot of fun pushing that back equally low and short.

I'm also not really fit to use much power now, so I focused on looping slow and heavy without that much spin but a high spin/speed ratio. It was easy and relaxing and seemed to work combined with my blocking game.
I had to compensate some parts of my game, so I focused on serves. I've got very inspired by these two serves from Ma Lin at 4:53:
and I've started using a modified shakehand version of that followthrough. My serve is now good enough that it won't suffer if I add a more complex followthrough to it, so I can do backspin, back/side and topspin variations with the same movement. I don't think I have enough fingers to count how many free points I got from that today!
I also threw a really spun up half-long reverse pendulum at the penholder today. About 5/6 sidespin and 1/6 topspin. He froze when it came at him and it hit him in the fingers, making him drop his bat. I wish I could have captured his face. According to what I've heard, even having a reverse pendulum at such a low level is extremely rare, so I'm not too surprised.
I still need to improve my whip mechanics, though.