Flamestrike
Legend
The numbers join up quite well. If you look near the end of the DMG there is a statement on sessions per level, and then if you divide out encounters into the XP you'd need to level and read other language on expected encounters per session - you end up with values that support that 6-8 statement being the baseline.
Yeah.
And if you run the math on abilities, you find the classes also balance at around the 2 short rest to 1 long rest point as well.
You can compare the extra damage (and healing) from a BM fighter and a Devotion Paladin of the same level (at a 2/1 rest frequency) and they more or less balance out.
Ditto a Warlock v a Wizard.