The main objective is to purchase a ward ASAP and run to the enemy buff that the other jungler isn't going to do first (or just ask them politely and they might just tell you ;).
Pop the ward right on top of the spawning monster then recall.
Purchase machete + 2 pots and start on the opposite buff from where you warded (if you ward red, start red.
Ask for a strong pull and smite at the BEGINNING.
As soon as you clear the camp TELEPORT to the ward you just placed and steal the buff.
Walk safely to your remaining buff and you are DONE.

Max E 2nd for soaking up damage in the jungle (but DON'T spam it because it takes A LOT of energy).
ALWAYS keep energy over 120 so you can Dash away if you are disturbed.

Every time your Teleport / Stand United is off cooldown try to help your team.