To my run, I tried the southern route. (see the minimap).
https://steamuserimages-a.akamaihd.net/ugc/18098942736254520...1) I got a Siege Onager with Chakram Throwers stuck on a mountain (after your first fight against some swordsman and used the camels that you begin with your hero, to attack a Onager to the other side of the cliff, so you could get your SO easily down the road near a forest that has a monk and a hero monk (you will need the SO to cut the trees and let Prithviraja go that way).
2) Then, there is a camel you can convert and a gaia Elephant Archer, they will be needed against the red Chakrams ambush. After dealing with them, just go south again until you find more Elephant Archer to rendezvous, follow the road until you find the transport. Load all your units and unload them on the beach to the left side of the river.
3) You can go all the way ahead until you see the purple walls of Bandits base. BEWARE, just go to the left and take ownership of a dock and build a transport. Now, return with your hero to the entrance of the base but go all way to the right, this way will avoid you a fight against many Elephant Archers, Camels and a couple of monks. At this moment, Jayachandra researched an upgrade to improve the range of his ranged units, so don't despair if you get shot, you just need to get Sanyogita and flee in the path you sneak into. The EA has ballistics, so take care that your hero tank all the shots. When you get out of the city, board with Sanyogita and Prithviraj into transport.
4) Follow upnorth in the river and don't worry about orange towers shooting, when you see a safe beach to unload both your units (see the image of my minimap), you can go the green wonder and win. No enemies are expected inside green base.