Treant Jungler.
Buy clarity on 0.12, go to the easy camp, use 3 on treant, farm. After that, do doublestack on right medium forest. You can stack 3 times.
Optimal time midas: about 6 min.
You can defence towers from 5 lvl.

You can die in forest by this reasons:
1) Your team doesnt have courier and you have farmed midas;
2) 2-5 enemy heroes wanna kill you. If your lvl 1-3, and your hp <30%;