With your current item build, you suggest selling your boots at the end to make room for the last blood thirster. Bad. :\

On the other hand, your guide is great, despite not having images or icons.

Berserker Greaves + 2 Phantom Dancer + Black Cleaver is a NEVER on Tristana as she'll easily overshoot the 2.5 attack speed cap with Rapid Fire. This is why I personally advocate selling the greaves mid game for the so much more utility of merc treads. That also puts your attack speed at just a hair over 2.5, not wasting your boot buff.

+1 from me
i agree with everything u see in there..my only prob is the ignite. I mean, u already have an abitily to reduce health regen and u dont need the damage, u r strong early game. As summoner spells i would keep flash(double flash is the best way to escape) and i would replace ignite by exhaust. i believe almost every dps champ needs it.
Great build though, continue the good work:)

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Check my build: http://www.mobafire.com/league-of-legends/build/kassa-the-legendary-one-89627

Very good guide for the fact it has no pictures:D