hi, first sorry for my English . i have been playing rank a lot, around 1500 games(win + lose). Being jungler tips :
watch all lane, when you see teammates got pushed or low hp, come to them, gank. For basic : u must know your champion strong and weakness. example, you use
.. : strongest skill : shot(close combat = healing ur self) , chase jump. weakness : low armor. learn about enemy weakness and strongest part too. choose gank lane wisely.
from my experience .. best jungler / ganker --> champ who have stuner like :
(my fav) ,
,
,
, etc. Stun / slow work best for faster gank ( i did alot with lv 2 gank ~ first blood) .
get red buff first + ghost. if your timing perfect... (they over position ) no way they escape