elder shen gaoren

can you help me with some good and easy tips for the urgent village gaoren?

I tried it with GS and HBG but he everytime destroys the city. wich weapons, armors or strategies would you recomment?

bombs and hammer is my usual setup, but if you are good with gs that would probably be better (just need a strong weapon to hurt his legs etc...)

The trick is to bomb one of his legs (2 large bombs) when he goes to attack the fortress. If you have a strong enough greatsword, a fully charged attack or two might work but I'm not certain you would have enough time. Either way, this should turn his leg red (or bright red if you already reddened it) and interrupt his attack completely.

thank you
I killed him with HBG jus position behind him and fire with Pierce