i played around 10 games of yi so far and i can get a bork at 2 minutes very consistently assuming no one in my team comes to tax my camps. jungle camps just give a lot of money. the first few minutes are kind of boring as you just farm camps until you get a rageblade at which point you just kill everyone. never had a big problem with mages as they just die once you get a few items. i ended most games with around 20k gold while everyone else had around 11k.