Other epic score , didn't even had time to recall back to get my 5th item beacuse I was busy owning them

Here's my last match with this build , Had such high score although game was short:

I can use this build with few modifcations, it's not so bad as people say IMO, I love Attack speed and Life Steal, that's why it fits me , with them I can easily jungle and take blue/red buffs so I can almost freeze running enemies and have infinte mana , Ofc I don't go for 3rd PD , but 2 with the the other items gives 100% crit which is hardcore , also very good speed to get in and out of fights, I think this guide is underrated, It's at least decent

EDIT:
I take 1 point in Rapid Fire at level 7, after I take my ulti , that's where mid game start and where the fight begin. and sometimes I max Rocket jump first for the CD decrease. Also I don't follow same mastery plan, I don't use that much points in offence alone

The third PD to be clear, is just to replace the boots as the last item in the build. Your movespeed goes from about 460 to about 425. It does however bring your crit back to capped since you have to sell EC for BT. It also increases your attack speed to the point where you dont need to waste mana on Q anymore because it doesn't do anything. You are right if you are saying you don't need it. It's just there if you happen to be doing so well that you can throw gold away.

i see no need in getin three phantom dancer the third is just giving you speed

Seems extremely unorthodox and unviable. Id have to try it out though.

Maxing E first pushes the wave too much for my taste. I absolutely late pushing as an AD carry. First off, maxing E ( Which has a ridiculously short range ) means youre putting yourself in danger. Since youre already pushing, youll probably close to the enemy tower. If you get silenced or stunned and a jungler comes along, youre guaranteed dead. Rocket Jump alone wont save you, unless you have Alistar or Janna, and even then it might not be enough.

Im pretty sure you max out on AS after you have two PD and you have level 5 Quickdraw... A 3rd PD and a Madreds on top of that, I feel, is too much gold in AS gone to waste. No last whisper to tear apart the tanks.

Executioners Calling early on puts you SO far behind for the mid game. Id probably buy this to stomp a few newer players on my smurfs, but nothing more. Tristana has an awful mid game - I feel as if youre putting yourself even further behind with this.

Just my 5 cents :/

Pretty short guide, and it doesn't explain the different uses of Tristana in certain situations and the use of her Rapid Fire does not provide an AD Steroid, it provides an AS Steroid.

I also suggest you try to colour/code items and other things for easier use by the reader.

Other than that your guide/build is pretty stupid. I don't know why you wouldn't take Rapid Fire at Levels 1 - 3 - 6 during laning phase, it makes it so that your trades are more powerful than that of the enemy ADCarry / Support.

Secondly, there is absolutely no need to get three Phantom Dancer's, the IAS Cap is 100%, and three of them is just completely pointless. Berzerker's Greaves and her Rapid Fire already cap it at 100% by themself, so you can build Tristana for full dps. That's why she is considered the "Highest DPS output" AD Carry, because she has no reason to waste space with Phantom Dancer's.

EDIT: Note that your Auto Attack range at Level 4 is 563 - which is plenty to hit them.
Reason being is that Ezreal has the shortest AARange of all Carries (550), and I can auto attack people fine with him, so there is nothing stopping Tristana from using Rapid Fire to punish an AD Carry even harder.

Also, maxing Explosive Shot first tends to push your lane - which will leave you wide open for ganks by their jungler. Explosive Shot also makes you miss quite a bit of CS because you can't autoattack fast enough early on to compensate.

Good start, but now it is time to wokr on your codeing and color. Look up johijohi's to makeing a guide in order to see how to do this.

Good for a super-aggressive beginning with a maxed DPS ending