I see what your trying to say. The build does come out to 1.5 attack speed after madred's. basic attack reaches 100 around level 12 so the trinity force proc will add 150 damage every time you tumble. Tumble adds 75% of your total attack so thats another 100 ish? (Numbers are probably wrong but close) Total your doing over 350 damage tumble. That is just boots and trinity force. Trinity Force also gives you movement speed and a slow proc to chase/kite as well as Hp and mana to survive longer and use more spells. Although the ability power does nothing. With Bloodthirst you do get scaling for tumble (extra 75 damage) at the cost of the extra hp/mp and the chasing utility.

This build doesn't have enough attack speed, using trinity force will only give 160 bonus + 90 autoattack or so damage every 3 seconds while buying a blood thirster or Madred's you would do about 80 ~100 each hit, if you had 2 attack speed you'd hit 6 times which is like 600 damage. A lot better then that initial 160. even if it was 1 attack speed, it would hit 3 times which is 300, better than 250 anyway.

Can you explain why? I like how on your build you want constructive feedback but you come over here and troll my build lol.

Trinity force = bad

reading this is like eating bricks... impossible. no alternatives, no zoning ideas, just... words.
just a little constructive criticism, plz dont take any of this personally.
Thanks, Blakhart

Its Under Skills Continued...

This is the same exact build that Phreak shows in the Vayne Spotlight video, but i still like it. It is an amazing build except the boots, I prefer Berzerkers unless they have CC. You also forgot to explain R skill...