User blog comment:TheTobarMethod/So...Tri-Force Vayne lol?/@comment-4888212-20130304032850

get statikk shiv instead, or last whisper if the enemy stacks armor.

you see, vayne usually builds several attackspeed items and has a high AS.

using Trinityforce once for tumble (1 in 3s), while you could deal more dmg with a consistent item for the approx. 6+ autoattacks you would do during this time.