Hey guys. This is my first guide. This is a guide/build for Diana jungle. I haven't been able to extensively test this yet however, I have, using this build done very well in the games that i have played.

Pros-
tanky
high damage
sticks to enemies like glue
amazing ganks
Cons-
weaker early jungle
weak to being focused
reliant on blue until you get catalyst

These are probably not the most optimal runes but this is what I use simply because i like the base AP and armor. It gives you nice early game damage and durability.

This is my personal choice of masteries. You could trade points in multiple places to fit your style.

The early two levels in the shield allow for very good durability in the jungle as well as ganks. As with most jungle champions, I E at 4 so that you have better ganking ability. Then max out q for the highest possible damage.

I personally use flash and smite. Smite is a must for almost any jungle champion. Flash on the other hand is one of the most useful on Diana. Other than being able to Crescent Strike to a creep and then Moon Rush to them, you don't have any real escape mechanism. Flash solves that problem and can also be used to initiate a gank with a quick flash followed by a Moonfall.