Evelyn Problems.

hey guys been maining here a few years. well Eve is my main but since 5.0 I've been kind of -_- well Piss poor. I find I've perfected the Mechanics and can get some serious early game kills on unsuspecting 20% hp champions if I Get seal it keeps me going and I get that early game Gank potential Not nearly on a khazix level of gank but it's meh worthy. So I got a few questions How are you guys building Eve ? whats your strats for Late game I find I'm worthless in team fights I kind of just pick off and kill the week members after they split off and then run away. (Of course thats more of a midgame strat late game I'm completely worthless since they all start rolling as one collective Group)

I can only seem to kill Mid lane mages as eve adc's /supports are untouchable in 1v1 fights even when I have the advantage.

For my E when fighting a tank like udyr do I need to be stacking MR or Armour pen to break through armour with my E ? does both MR/AR apply to my E ? I'm assuming no matter how much AP I actually build it all gets transferred as physical so Stack armour pen. (I'm Canadian Armour is right)

I've been experimenting with quite a few builds they all do Well early and fall off hard after items like Phantom dancer Deaths dance steraks Gaze are built by my enemy.