Expansion CBA

So I recently got the AOE expansions on steam. I found some custom maps and I've been really enjoying playing CBA front towers (where you switch between all of the unique units and whichever one you have will constantly spawn for you). I was wondering if there is a custom scenario similar to this concept that uses unique units from all of the expansions, not just up to the Conquerors. Like, does anyone know of a CBA where you can spawn Elephant Archers and Karambits? Cause I'd play the heck outta that.