1st-4th gold
Altar 5th, then wood
Moonwell 6th, then wood
AoW 7th
Wood 8th
Scout 9th
Gold 10th
Wood 11th, 12th
Moonwell once you get 40 wood
Start pumping archers, get KoTG as your hero
Tech asap, keep pumping archers
Use KoTG entangle/archers to harrass him, don't let him creep as much as possible
skip tier2 entirely, and tech to tier3.
Build a AoWind while teching to tier3
At tier3, if you still have any archers left, mount them on hippos and start pumping chims

The hardest part about this strat is harrassing him effectively. You have to make sure that you dont lose too many units that he can simply counter you with, and you can't let him creep too much or else you fall behind. Use shadowmeld effectively and you can avoid death in the night. At tier2 you can get a warden with slowing dagger, which will help you assassinate units. The goal remember, isn't to kill him, just to delay him.

Oh and minor edit: remember, if you get corrosive bile for your chims, even if the tide starts turning, you haven't lost. Use their long range flying siege to take out buildings, farms, townhalls, expansions, etc, and just fly away from anything he sends at you. At the very least you'll buy yourself time.

And if hes foolish enough to attack *your* main base, then just counter him. Your chims will tear through his base FAR faster than his army.