What am I doing wrong?

I'm having a lot of trouble winning in Arena and squad battles with teams with superior character squads. For example, I just got beat using the exact same chracters. My Borssk is Relic 3 theirs had no relic level, my Boba is 5000 points higher then theirs and my Jango is 4000 higher than theirs. I got beat easily! I also lose to significantly lower power Dark side Revan squads when I use my JKR squad.