>>33134492Low energy moves are best used for gym defense so that they perform them more often, but since 'Lee is a bad defender, it's basically a bad roll. Low Sweep DPS isn't that far away from the DPS of its regular fast attacks and leaves it open to be attacked while doing it, so you generally want charge moves that deal the most damage.
There are exceptions, like
>>33133252>>33133273Zap Cannon deals the most damage from a full bar, but Thunder is a strong, quick strike for the same energy amount, so the former is better for raids where its harder to dodge but you don't care since you just want to dish out damage, while the latter is better for gym battles.