kilpatds
Explorer
As someone who's spent a LOT of time in higher-level play and (mostly 4e) theoretical DPR analysis...It is useful to establish a should-be ratio between twice per day spell damage versus always-on dpr.
DPR can be overrated, and I think treantmonk has a video touching that. Always-on DPR isn't a thing that willingly happens/should willingly happen... combats are less than 10 rounds, and a 10-round combat is a LOT. If the combat does go 10 rounds, spike damage is even MORE important than DPR, because you are going to have threats from the monster side that will end it well before 10 rounds unless you deal with them.
This is where wizards shine: the CR15 scary-brute that's banished because portent said it rolled a 5 on the save.... that changes the combat in a way similar to 300points of spike damage this round. That's WAY more effective than 90 damage from a direct damage spell. And doesn't even pretend to compare with 40 points of DPR. So if you want martials that can be mythic, I think you want martials that can do hundreds of points of spike damage (DMG: creating monsters, monster statistics by challenge rating. Except that's not the table they ended up on, AFAICT). Or alternately, martials need to be able to soak 100 points of damage a round and still make it to the end of a 5 round fight (same source, same caveat)