daily reminder that vayne can deal more true damage than darius

Can and does aren't the same thing.

Burst Damage vs Sustained Damage.

A Darius may only chunk 1k, but its 1k immediately, where vayne would need 5-6 procs of Silver Bolts (Which means 3 consecutive hits on the same target in a teamfight).

I'm not sure how that's a fair comparison.

The highest health I have seen is ~8k on Cho'Gath.

Vayne every 3rd attack does 700 true damage. The highest AD I have seen is 1100 on new Fiora; Darius has an extra 200 AD from his passive (multiplied by the scalars of dragon + mastery into 235), making it go to 1335 AD, 1194 bonus. At this bonus AD his ultimate does 1195.5 - 2391 true damage.

So, at max bleed stacks Vayne needs to attack Cho 12 times to outdamage Darius. If Darius ults 2 things, She needs to attack Cho 21 times. If Darius ults 3 things, Vayne needs to attack Cho 33 times to outdamage. If Dairus ults 4 things, Vayne better hope the enemy team has another massive health stacker because her dummy died.

Even then, why compare the 2? Vayne has to hit something 3 times without changing targets; Darius has to press R on anyone within range.