Hey im coming from Dota, at the moment i enjoy league, and i like this build so i wanted to share it here, if you are anything above my rank (SILVER :D) you will probably figure out some other stuff yourself. Adaptation in items is good (i come from dota, that actually exists there, and maybe this season it wil be increased in lol, too, but for people on my rank, maybe playing what they are used to and focusing on the map is more useful so just try it and see if it works for you too.

just keep in mind you are a early game loosing jungler, that needs to use opportunites but dont overrisk it, once you have ult, you can plan more what you are trying to do but dont force it, just farm up, help some lanes, once u got the 2 damage items, you can skirmish very well, and after that you just get tankier and tankier and the enemies keep trying to kill you every fight not realising the point where they just have to stop thinking you are a little fae mage of the woods, its more like playing a roaller coaster, made from steel, extremely fast, may feel dangerous but its actually so safe.

THis build really works against everything, just replace Tank MYTHIC ITEMS with the one you prefer in the game, if they dont have alot of magic damamge, why keep the chemtank active, you dont NEED it. JUst be tanky, be fast, dont let anybody escape the teamfights and do consistent damage to all of them, if they try to go on you, you did half of your part already, next steps are easy, for you and your team!