So how do i build correctly

I just had an amazing match WITH A HOLY LAST STAND but sadly lost due to i was 1v5ing- (literally i was the last one alive)- them and they outdamged my healing, i guess i built wrong items? Zakzak and ar boots and lyindri(idk how to spell her name) and visage, my question is how do i build this champ rune wise and dmg wise where i can be a litterally soul games last boss? Like i want shit tons of heal and dmg and shiled at the same time, i am in deep love with this champ he is making me go crazy and i love it

FUCK YONE THIS IS MY NEW MAIN