I Need a Build for Giants Fell One By One

[:1]I'm at lvl 14 and would like to use this quest (since it is always repeatable) as a XP / Treasure Farm but mainly as my PvP practice since this quest has the AI rushing you within the first couple of minutes with multiple waves. My Axeman usually take care of these waves however my main thing is to finish the quest as soon as possible. Currently 25 mins is the fastest that i do it with as i build about 10 axeman to stop the waves coming at me as i as age up to pump out chariots and war elephants.