You honestly don't need PD on Tryndamere though.
And after you finished your zephyer, you should have rushed IE so you really start dealing damage.
PD should be substituded out for a botrk for extra damage, lifesteal, and attackspeed. instead of crit + attack speed
(Passive is all the crit you really need, and with IE, you are rolling around 65-70ish crit when full)