@I-UsagiTsuki-I That is a very poor representation of power for a few reasons
1 - this is JP's dummy Rockbear meant to scale damage, so it's not a full reflection on how it will work in real practice
2- you can tell the video was sped real up to charge the maron, which even shows it still took a long time to fully charge.
3 - many content has a damage cap of 999,999 that was specifically to counter stuff like that, so the power of that can be gutted just depending on the content itself.
Sure in practice due to how maron works it technically can go faster and likely better, but mind you're either putting a ton of work getting an army of fully decked out marons to do this on a rapid pace or it's as is intended, a one and done nuke every once in awhile for blocking attacks with it.