At end game content I often get my arena team of 200K power (4 lego) smacked  by a team with  no lego in them and often 60-80K power below my team

However........I started paying attention to player level (I am level 72 with a 6.5 mil power account)

So now when I look at arena classic and Tag, I am sure to check out  the players level

meaning a Level 100 player with a arena team of 3 epics and 1 rare totalling 130K power will likely kill you over a player level 58 with a a 4  lego team totaling 240K power

Something to keep in mind based  on my player experience