the reason why i go 2 phantom dancers is because the crit hit with 2 makes up more then enough for the lost damage. I play trist as my main champ, and i have had better experience lvl up rocket jump first then explosive shot, u slow them down and do a ton of damage. I will check out those items and see how i like them. Thank you for suggestion.

2 phantom dancers + Tristana's q puts you over your maximum attack speed limit (2.5 attacks per second). If you go 1 phantom dancer and a madred's bloodrazor + your q, it should put you right at 2.5. Madred's also gives you more damage, especially when its passive is combined with epic attack speed. So, basically, Madred's is a lot better imo.

Also, Last Whisper is a pretty terrible item to get early imo, since the opponent's armor won't be high enough for the 40% penetration to rly be worth it. It's really just a late game item. Black Cleaver is generally better to get early or else you can wait until later to build your Last Whisper.

Your ability sequence is kind of silly imo too. You gotta level up explosive shot first for the damage around your kills. Get jump as your second ability, so you won't die, but level up your attack speed ability first to help get kills.

It's a pretty good way to play Tristana, although I admittedly would only buy 1 PD, if I even bought 1 at all =P