Uh, I answered it on page 2:
You tried to hand wave it away suggesting that it took so long because 'we were bad back then', and I quote:
Now, let's break down just how wrong you are. Spoilers, it's quite a lot
https://youtu.be/ZIoyLNYyOzo?t=449
Now keep in mind that that by the time that Mizzteq made this guide, she was at or close to BIS. A prog PLD had more in the region of 4.5k. Now look at the numbers that are coming in later on in that fight.
1.3k auto attacks, 2.2k hood swings with no cast bar and then we have the big one: It doesn't sit there channeling 5 second casts whilst doing a whole lot of nothing. So we've got an auto attack that does some 30% of a tanks HP, and a mini tank buster on a short cooldown that does over 40%.
Riiiiight.
Maybe you need to stop trying to preach your views as gospel when you don't actually have first hand experience of the content back when it was relevant? The achievements don't lie sir. Don't get me wrong, I'm not here to tell you what you can and can't believe. But please do consider toning down the whole 'I know everything' when you quite clearly don't. Stop pushing your conjecture and head canon as fact.
Now getting back on track.... How do we implement this into modern savage? IMO it's simple, allow bosses to keep auto attacking whilst casting, and allow those auto attacks to crit, maybe even give them crit buff procs to make things even spicier. Honestly, if modern Extreme, Savage and Ultimate bosses did auto attack damage even just on par with caduceus scaled up to modern day HP values, this wouldn't be a problem as without a healer to maintain that tank, there's just not enough sustain to get anywhere without abusing things like spin to win (which I'm fairly confident has been completely eradicated at this point?).
A boss with streaky white damage that has the potential to 2 round the tank into the floor at any point stops me from focusing in so hard on the glare spam and takes us away from the problematic meta where damage is tightly scripted and known in advance.