eve help

recently started playing this champ she seems to be in a pretty good spot right now what do you guys build her like

i go for my lack on cc i like the ap smite on her usualy next i feel like this does allot but its sort of situational on her i either build this and i build tanky from here on on before this or usualy

she can become quite tanky and has a great ability to kite while fighting so i like her ap

oh yeh i was wondering do the effects get lost if you buy more of these you know can you like only have 1 item build from a sheen