6☆ Yoda destroyed my team. My Ima Gundi is only 5☆ and he is a must for leader. Only way to win is with counter attackers. Old Ben is no use as Yodas biggest problem is his auto attack grants him dodge every single time. He hits for 3-5k and my healers cannot keep up. You really need a 7☆ counter team to beat him at 6☆. Idealy with Ima Gundi as Leader, with Kit, Aayala, Quigon and Lumi.
But with all that being said after looking at his skills i think hes just average at best. Like Vader and Kylo you want him so bad but once you get him you wont be using him very much. He is not a critical character like Sidious, Phasma or Lumi is for example. So im not stressing about the Yoda challenge too much. Still waiting for ROTJ Luke...