This is a simple easy guide to jungling Diana with a tanky but offensive build structure. Diana is a tanky mage jungler whose absolute dominance late game makes her a huge threat as both a DPS, but with a great deal of sustain.

Initially, the Regrowth Pendant is just help with sustaining the jungle without needing to back and heal. After first jungle clear, you should have a decent amount of health left for a gank. Getting the early Philosopher's Stone will help with that as well, but also the gold bonus is helpful. All other items are geared towards sustain at first, but with the addition of the Abyssal Scepter, Lich Bane, and Zhonya's Hourglass, damage will start to accelerate very quickly.

In short, remember that Diana is not a huge threat early game with this build, but you will be able to gank and get the kills to the people that matter on your team. Once the build takes off however, you will see that your damage and sustain are phenomenal.