Effective Builds. Please help me.
How can I build according to my game/situation in an effective way? Say I'm facing a Zed and he is fed or is really powerful (AD Zed). In this case, I would normally build something that gives me armor. This exact situation just happened in my last game, and the armor seemed useless. He was building armor pen I saw, but then I didn't know what to do cause the armor that I build he could just counter with armor pen. And then at the same time, I don't wanna build a full Randuins on a squishy like Zed. IDK, maybe I should have built randuins, my main question is: How do I know exactly what items to get based on the situation? Like if I need armor, do I get Randuins? Or get Frozen Heart? etc.
I know this is kinda noobish but... Im a noob
(if you're AP) or QSS
(eventually into
) if you're AD. You can zhonya to avoid the damage from his ult or remove the death mark with the QSS.
rather than 
) to keep your squishies (presumably including you) from being caught alone will help prevent your opponent from capitalizing too well on their advantage.