Who should I replace im my setup for Gina?

I am a pretty new F2P player and I've heard Gina is good in arena. I currently have Flint, Molly, Sergey, Bahiti, and Patrick. I am thinking about removing Bahiti because Flint and Molly are obviously my strongest, Sergey and Flint are my tanks for front row, Patrick heals my team and is a benefit even if his damage isn't great, but Bahiti just does damage which Gina probably does more. Am I thinking right or should I remove somebody else?