Please,** NEVER EVER EVER EVER EVER EVER USE YOUR W TO JUMP IN THE FIGTH AND DEAL DAMAGE!**
I feel like i have to post this, becuase i've seen too many Tristanas jumping on top of someone, gettting focused and dying.
You have one of the best mobility spells in the ADC category. If not the best. Use it to get out of trouble. Not to get yourself into trouble.