i find it to be a very shit community (look at this thread and 99% of all the other treads) but there are some respectable individuals and i always like to share my experience with people who ask.
you dont even have to ask nicely, thats why im sharing my experience with you too, you know. i dont care about "Oh this guy isnt so friendly", its all just talk. seriously, if you are a person who complains about rudeness (its not like im insulting you or anything, im just being unfriendly), your mental energy is fixated far too much on meaningless bullshit not just on the boards but in life in general. its a mentality. thats why you are silver and not diamond even though you could very well be diamond from your skills and intelligence. i can tell you 100%, being diamond is a mentality thing, not a skill thing.
if you are now very honest to yourself and read my posts again, you will notice that i actually shared some really key knowledge with you here allready. you could actually climb to diamond just from the things i said in this thread if you thought about them thoroughly.
example: i said ""with these two items and building defensive" any champion who built two full offensive items that require him to auto attack now is full squishy and is still allowed to keep playing the game?"
what you can conclude from that is that every decision an enemy makes has direct effects on the game and if he decides to go full squishy auto attack stuff, no matter what champion he is, he will not be able to auto attack (unless mega fed) properly because of how squishy he is. since he has devourer, i take it he is a jungler right?
most devourer junglers have a weak start and are still relatively weak at one item. now if you play a strong jungler who either duels and scales good or at least has a really strong earlygame like elise, lee sin, kindred and plenty others, you can easily deny most devourer junglers their second item for a while, ESPECIALLY if its an offensive item.
their weak build allows you to take control of the game and direct the flow of it. you can basically do whatever you want because most champions should be stronger than almost any devourer jungler at 1 item point. even tho not every jungler can just go and invade a jax or master yi, you can always do something that is absolutely more usefull and generates more gold for your team than whatever they can do with their item and their build.
what this means, essentially, and it can be applied in many situations is: he gave away control of the game for free just by his champion and item choices and you are now free to carry the game with good decisionmaking. the game is in your hands and he cannot win it anymore unless you fuck up badly.
now if he GETS rageblade and if you LET him pick off people and snowball even harder and he GETS his third item before everyone else then all right, he probably won the game and you cant stop him anymore. but then thats on you, not on the items.
you see. there is alot of information in such a small, unfriendly post. you can just think this up yourself, its no miracle. but you prefer to see my jerkyness instead of what i share with you. you probably would see it if i was super friendly about it, but thats exactly my point. if you want to be spoon-fed, you not gonna get anywhere.