With correctly hanging back, proper calls from jungle, and general defensive early lane, you can easily gain 6000 gold before the first back. make sure you build minions fastest, and rush eve and shatter. you'll be working near your turret, and not in the jungle. so you can wait on boots. After that rush, I recommend ether frostburn or clockwork push (both if you are really pushing them hard) depending on if you need shorter chases (slow them) or if you need more mana/faster cooldowns. Final slot, I recommend either a high defense item (base on oppositions builds) or for warhorn (turret slayer/kraken). If you feel like really hurting them, then throw on an extra shatterglass :)

Start with rushing shatterglass, this will boost your heal, and your teammates will love you. I usually do not get fountain of renewal because there is already a heal with petal. After shatterglass, aim for either the crucible for the strong sheild, or for frostburn to slow enemies for teammates. once you have those, work on other defense and utility, I prefer shivsteel for even more slowing, and also warhorn to take out structures and for the team speed boost.

AS SUPPORT: you are tasked to "ward" the gold mine, use a scout mine in the upper corner of the mine so you have visual on it. Do it for your team, you want them to love you.

Eve of harvest is your best friend. Same with minion candy. You can solo the full jungle without losing any health with eve and minions, and the candy makes them stronger. Save candies for teamfights, the plus from candy, a crystal infusion, and your already high crystal power give you both extremely good lifesteal, but also a ton of damage. Personally I have been able to not only withstand a SAW spin up, but also kill him in the time it takes to use the skill. You will become an indestructible yet adorable war machine, reigning terror over the jungle.