I have a 4 star Vulko, and he's enchanted, and trained, but still....squishy. Petros was my choice, only since i was a few stars in, and needed all to get him to 4*. The other characters are interesting, and will .. i hope... be eventually released in shops. Petros and Vulko on this one. IF you have neither, go with Vulko- that was my choice a few months ago.. he's good in HOL, and crucible, then get petros.