User blog comment:Linathan/Squad Spotlight: Fun Being F2P Part 1/@comment-26464145-20151019072423/@comment-26140304-20151019203752

I couldn't explain it any better than Bumblezel. These squads are meant to display the bare minimum of what you would need to have to take on certain challenges. If you happen to obtain a Rare Summon unit of a unit listed here of a similar role, you are free to replace that unit for more effectiveness.