I found this weird "exploit" in the valley area. I don't know if anybody else saw this...
If you run all the way to this spot where there is a dynamite ganado and you drop on that small roof and hang out under the bridge, you can get into a situation where the dynamite guy(s) will keep throwing dynamite above you and kill most of the other ganados who try to reach you. You won't get hurt by the explosions.
This doesn't happen all the time though. Seems it happens only when there is more than one dynamite ganado up there. I think if there is only one, the other enemies have the time to make it to you. I ran all the way there right from the start of the battle. I tried multiple times and sometimes it doesn't happen as shown.
Another weird thing is that you can activate the rotating switch from underneath the bridge (seen at the end) so be careful where you are when you press X.
This is on PS5 version, Hardcore NewGame.