Any ranged can jungle. You need to know leash locations you can stand to split up mob packs. This leaves only 1-2 attacking you while the rest run back and forth.
MF is a very good jungler due to healing debuff.
For bottom, one is near bottom of bush by wraiths.
For wolves, it is directly underneath and slightly to right of bottom wolf next to forest edge.
For big golem, you can kill small golems first on other side of forest, then leash big golem with heal debuff.
For small golems, it is far inside of bush.
For lizard, you can kill small lizards while leashing big one above the spawn, then kill big lizard while leashing with heal debuff.
21 offense or defense, 38% AS runes works.
I used to clear the whole jungle with dorans blade + starter pot, but you don't get starter pot anymore, and they nerfed MF movespeed and strut, and took away negative MR on jungle mobs, so you probably need cloth + pots.
I'm not sure if this is WAI or an exploit though.