They should just remove the AD steroid from Vayne's ultimate because it's just way too oppressive.
Edit: An idea to rework would be to make it like Garen's old W passive, except on the active.
Something like: Vayne's attack damage is increased by X% of her bonus attack damage.
Would make her less oppressive and to obtain the current values, she would have to rush some early AD.
I mean, why the hell is she still allowed to get an AD steroid on her ultimate?
Since Patch 5.22, they increased the % max health true damage to 6/7.5/9/10.5/12% from 4/5/6/7/8%. This is already a huge fucking buff. To compensate, they removed the base damage (tho they added a minimum damage for no reason, as it's MAXIMUM health and not CURRENT health) and removed a little bit of her AD per level.
However, none of this fucking matters.
Vayne has always AND will always rush attack speed. Just see her current build patch and how bullshit it is:

4 of those items are attack speed items. She literally ony has her IE and armor pen item that is giving her AD (and a bit from BoTRK), giving her only 130 Bonus AD. However, she doesn't care.
Why?
Because of her fucking ultimate that's why.
Why is this champion, first of all, allowed to have a build path that literally gives her NO AD at all, yet, still deals a huge amount of physical damage. If they wanted her to be a Silver Bolt bot, that's fine. At least, some squishies can beat her like Assassins or burst mages. However, she does fucking both right now: Assassinating Tanks AND Squishies. All this because of her stupid Bonus AD from her ultimate.
She gets 30/55/70 AD from it.
That's why she doesn't need to build attack damage at all, unlike all other ADCs who need to buy expensive AD items like IE or Essence Reaver. Attack speed items are wayyyyy cheaper than AD items and thus, making her comeback more quickly even though she might have slost lane to someone like Lucian or Ezreal. She already gets 30-50% AD on her AAs each 2 seconds with her Q (even less as the cooldown starts after the cast), then she gets a huge AD steroid on her ultimate.
Please Riot, just remove the Bonus AD from her ultimate. If she needs to buy AD, then she should fucking buy AD, not press R and "hurr durr, bloodthirster's equivalent of AD".
P.S. OH yeah. Even though she only builds attack speed, she still gets a decent 4% attack speed per level, the highest amount every ADCs. And she still gets a decent amount of AD. rofl.
, 130 AD is as close to no AD as it gets.
. Also trade one to two autos with her and back out. Don't let her proc W and you've won the trade because you probably have an extra 50 ad from your
. Now that Silver Bolts doesn't deal flat dmg anymore it's worse against squishies as well. Another window of opportunity for you to punish her in lane.
Also
the same way I handle 
