Seasons
If gaining energy would push you past your limit, can you choose which tokens to keep?
The rulebook lets you keep the limit from among all your tokens, and the decision comes before other actions.
Yes. Take all the new energy first, then discard down to your limit from the full set, choosing which tokens go. Transmuting and other actions wait until the reserve is back within the limit, so you cannot gain past the limit and then transmute the excess.