Team game black forest civ combo

My friend and I like playing against his brother and a friend of his on black forest for the late game grinde. No rushing! It's always good fun. I was thinking about sweet civ combos for that and my most recent idea was: Persians: trashbows, paladins and some war elephants for the tramble. Malay: FU arbs and trash longswords, maybe a bombard canon

Even with trade i find it's tough to go full gold units and its easier to have a trash unit in the mix. It also complements nicely since as persians you spend wood on xbows and food and gold on palas+elephants and as malay food for longswords and wood and gold on arbs. No siege onager but siege ram (malay) and bombard canon for both. What do you guys think.? This gon beat their asses.? Do you have any better ideas.? Thanks a lot!