Given that you have read the introduction for CL on the english wiki
and already have seen that there are alliances,

this is a very early stage champions league setup,

4 stronger teams and 2 weaker ones

so you can get a win easily as long you keep your defender team super low, so you keep getting score stolen to find easy opponents after coming back online.

It is important to understand that you NEVER should look on the damage number to determine team strength (beside that fist) because that is just the basic strength, it doesn't take into account the buffs, nor the alliance boosts or hatreds nor other skill options a team may look weak but surprise you.

Because of that : Always look into the opponents available to you on the rank list, because a high number in the team overview can just stem from one or 2 high heroes and the rest might just be stupidly put together, EASY WIN you just have to make use of the up and down arrows on the left side below each team to pair them accordingly. Match your weakest teams against their strongest and hope for the best with your 4 strong ones. Sometimes a minimal tweaking with the matching can turn a draw or loss into a win next round because random luck and skill proceeding chances are also in effect here! Good luck!