For a good CS bot laner such as Tristana, you need to be laning with a support that has either long stuns or great amount of health or healing. This will most probably guarantee early kills without having to harras as much. Keep farming and you'll just end up with a good head start. use W whenever needed to avoid jungle ganks and aoe suppression by enemy foes. Remember that you're squishy and you'll need to farm constantly to compensate damage taken.

Once you had all your skills learned, start ganking whenever needed. Your use of teleport can guarantee an intrusion on other lanes. You can still get blue buff whenever possible, although your runes and masteries provide just about enough mana regen. Try to push your lane whenever other allied champs are keeping other lanes busy. Red buff is a must for multiple kills during teamfights. If you noticed that enemy champs are countering your items with Thornmail for instance, make more use of anti-tank items and

One you got enough kills in your pocket, all you have to do is be last to enter team fights. This will provide you enough awareness on who to kill first and who's in your team is in need of your interference. Everytime your enemy loses a team fight, push hard to win. Good Luck and enjoy my build.

Cons
The only Con in this build is Tristana's low health regen but that can be compensated with your high lifesteal ratio. Tristana is a squishy champ even when you build tank on her. So more damage is your only way to victory. This build is mainly a bot laner helper. If you mid you want to make sure you're not laning against a mage. Otherwise, you should build some magic resist on the way through.

Pros
Your E passive works like a charm once your build is completed. It can kill Tryndamere even when he ults because it can do damage for a duration of 5 seconds. This build ensures you great amounts of damage against all kinds of AOE and Tank builds.