User blog comment:Linathan/Guide: How to claim your FREE unit (Brave Frontier 2nd Anniversary) & Lucia/@comment-99.157.54.210-20151101231801/@comment-181.171.210.217-20151103230034

I'd go for Anima.

Breaker's probable a good choice as well, but that little extra HP always seems to save me during emergencies.

Still, check that Avant's REC is really low for a 7* (1762 aprox. for Anima, 2000 for Breaker, at max level), so long as you can keep him healed properly I don't think there'll be a problem.