This build has worked great throughout many pubs, give it a try and jungle often. The beads can be bought whenever, but if you are up against a god during laning with a nasty crowd control ult, pic them up as soon as possible. This build works great for Baka and Wukong because you gain so much movement speed early on, making it hard for people to escape from your high DPS basic attack.
For those who don't know hand of the gods allows you to deal a quick burst of massive damage to enemy minions or most importantly, jungle site minions. Use this whenever it has cooled down to save your mana for other things. The items don't have to be bought strictly in this order, for example if you go back to base and don't have enough for a level two or three of one of the items but can afford the next item at level one, go ahead and buy it.