I don't know how popular this idea is, but i haven't seen it much, so here it is for those who haven't thought of it. Basically, in your second weapon set, bring a +12 +15 -1 energy regen symbol instead of a shield. If you now expend all your energy and swap back to your shield set, you will have negative energy. It says 0, but trust me, the game records it as negative as you will see your energy just sit there (and if it wasn't true, it would be a huge energy exploit). That's all well in good, but when you combine this with Warrior's Endurance, it essentially gives you the ability to refill a lot more energy than the skill is generally intended for. Say the max on WE is 19. Well going from 0-19 is not as nice as going from -27-19. If I had run WE while I still had the high energy set on, it wouldn't work, because the real min is 0, not -27, thus i can still go only from 0-19. By swapping back to the shield hand and making a min of -27, i can make the -27-19 behavior happen.