You should try doing this:
That is a Chaos NUR challenge. NUR = No Upgrade Run... that means you mustn't get any gorgon eye, phoenix feather, minotaur horn or upgrade any weapons or items... you can't use any godly possession either because it would be no challenge at all :P.
I did that twice and the dude in the video is showing the best strategy to beat Zeus.
You have a full life bar, a full (but depleted?) magic bar, a full item bar and all weapons and items upgraded... and you're also playing on Titan instead of Chaos... so that strategy should give you 999% of chances to beat Zeus.









