methionine
lysine (each 500mg only, and seperately)
There are more amino acids which are considered (or accepted) to go into the TCA. I tested also proline, arginine and histidine with (possible) sideeffects (obviously other actions of them). Just bought BCAAs, will see.
It turns out that I should take methione and lysine seperately, and best half an hour after a meal (probably a meal with quite some protein, need to look at that further). The reason for seperation should be, I think, that the combination might be used for other (even unfavourable) actions (so, it´s also a bit a riddle in view of the protein meal).
The fuel of non-pyruvate can be seen in textbooks or best in Fluge 2016, page3, figure1. Fluge found pyruvatedehydrogenase reduced in cfs. So to sidestep pyruvate seems logical enough.