its not only about dps, the incoming damage doesnt seems like correct to me.
I can understand a bis tank could tank MC bosses with dual wield or maybe BWL.
But if you are tanking bosses like thadd, anub etc in naxx with dual wield is way out of circle. Like its end game content boss and you could dual wield?
If thats the case i am playin on wotlk now, and i have bis tank that means i can tank LOD with dual wield as well but its not the case there.
Okay if you watch carefully the anub kill video, the tank got enrage buff which means he wasnt even def cap for the boss lol, tanked the boss with no problem at all just like a dpsing a mob in 5man

I know VG is overtune but that doesnt mean on legit scripted server you could do this dual wielding tanking end game content bosses without any problem. I have seen different various retail old videos on youtube when i was tester and we were searching for proof espeically on PW, Anub and Thadd. And so far i havent seen tanks tanking dual wield.
You have 40 players:
- using engineering to its full potential
- minmaxing their chars
- playing at a very high level of the game
- not slacking a single bit
- using proper debuffs on each boss fight
Engineering in vanilla only provides you aoe dmg aka sapper, and on single boss fight i dont that would boost your dps that much.
Proper debuffs, i doubt so. If you see the boss videos there, all three warlocks were usin corruption in every fight. Then you could see the tf debuff, 2x curses, 8 mages fireballs, 1x ignite, 1x sunder, 1x annhialtor, 1x demo shout, 1x farie fire.
These all debuffs sums upto 20 debuffs on a single boss.
Okay i can understand the they are doing tryharding dps on bosses, but 2k or 2k+dps as melee lvl 60 isnt that kinda of dps seems way off? Espeically on alliance side, i can understand if its horde side cuz of WF totem. Maybe fury warr with bis gear and all cds might touch that value in execute phase.
If these videos are legit and retail was like this and new classic would be like this, that would be faceroll one day progression. But i highly doubt retail was near close to this, yes maybe it is in other stuff like quests scripts, bosses scripts but the damage incoming and outgoing i highly doubt on that.