A nice big battle. Evenly matched in strength...but its the Egyptians and their chariots that you face in the desert. So not a foregone conclusion if you let those chariots get you.
This save worked on my V1.5 RTW yet it is a V1.3 save. Medium battle and campaign difficulty with huge unit scale.
With a few Mercenary Hoplites and Eastern Spearmen you can make an effective anti chariot wall. Benhind that your deadly archers can kill the Egyptians. Defending a hill you can weaken the enemy prior to the main infantry clash.
The Egyptian general is cavalry. Thats a relief. Take him down early with massed cavalry and elephants.