The absoulute WORST part for me was when you fight the Kratos clones(called Doppelgangers). ON GOD MODE they freaking kill your family in like 5 hits. The guys with the blade of artemis kill her in like 3. So then im using Valor of Hercules up untill the roof falls of. Then I use Army of Hades, and give health to wife. After that, when lots more come, I activate Rage of the Gods and use Army of Hades again. Then give health, posiedon's rage, and right before Rage of the Gods is out, use Army again. Then when the Artemis dudes come, Army, again. Finally, after Army is gone, last Poseidon's Rage, and fight off the rest. When only one doppelganger appears at a time, I just grab him and wait for the next. It takes about 50-100, it will murder you, I hate the doppelgangers. They are only hard on God mode, otherwise you would say they are no challenge at all.
It's been a while, hasn't it?