What options are there for expanding the exertion pool size beyond proficiency bonus x 2? Not just refilling the pool or decreasing the cost of a maneuver, but increasing the max number of exertion points you can have at once.
- The Martial Scholar feat grants +3 exertion
- Adapts get bonus exertion as they level
- Heralds can burn spell slots for temp exertion (but don't get the normal prof x2 pool)