Stop using nugen pokemon like corviknight right now!
Always rely on true and tested oldmons like the one in picrel!
Why 4 speed EVs? to outspeed dragonite and fuck it with taunt of course
You want to start with one taunt and then an iron defense right after
Keep body pressing the fat dragon, but only two times, you need to reapply taunt again, can't let the yellow barney setup those DDs too early, right?
Another body press and you might be tempted to click that zoomer gratification button that they call terastilize, but hold your horses, you want to still be steel type for a little longer.
By now the dragonite will reset your buffs, so reapply iron defense 3 times NOW
Forget about taunt, dragonite will have it's shield up and it won't work, but who cares? You're a fucking skarmory with max defense now.
You can finally terastilize, don't forget to use attack cheer and 4 body presses before using the attack cheer again.
Profit.
Got confused by hirricane? Run and try again. Got paralyzed by thunder? Run and try again.
Dragonite got a crit? Kek
If none of the above happen, you'll finish the raid ezpz
Final note: You may want to use a pp up on body press or change roost for any attacking move to build the tera, I honestly didn't had to use roost once.