how to win in the jungle low elo
you kill 4 camps go b upgrade smite and buy 4/5 health potions
since most other junglers are not buying health potions you will be able to stay in the jungle longer than them and farm more ( they usualy just rush for items)
since you are full hp and the enemy jungler wasnt smart enough to do this (usualy) go invade him even if its a jungler you can not duel just keep your flash/leap and what ever you have to ascape ready
now you wil most likely find him at 10% of his hp strugling at his red/blue depending on where he started if hes not there ward and steal his buff if he is he wil verry likely be verry low hp last hit him
now you dont want to go for ganks you have potions and allot of hp your not in danger unles you see a free kill
you want to stay in his jungle take all the big monsters leave the smal ones so that he can hardly get anny xp and will be level 3 to your 5
if this worked out for you, you can keep on taking his jungle just watch the map and ward (wich shouldnt be a problem cause you have the gold lead) cause he really can not duel you