I mostly AFK NMZ when playing other games, I just tank the enemies with absorptions and refill the absorption meter once every 15/20 minutes or something. You can also take Dwarven Cake to lower HP to stay a little longer.
10 Hours a day for 3 weeks? Nice
Well that way Jagex can't tell you are botting at the same 'pc'. You have 2 different IP's when using private proxies.