Most of the battles are just testing whether you are lucky enough (e.g. battle 5). Disgusting fights. What a waste of time.
I disagree, most of the teams actually did have a strategy to them, you just had to figure out what it is. The fire into water fight was one where you had to get rid of wraithcaptain and make sure you get an energy blast off that killed the front 4.
I think all of them had a strategy except for the death revenge team. Or I couldn’t find it anyway, that one was such a pain… Think I’ve tried it over 10 times haha. Eventually ended up with death roulettes because I ran out of idea’s :’)…
I cannot call it a strategy when it relies mainly on keeping certain monsters alive by how lucky you are. Just like battle 5, if your leo hits the damn auto protector instead of legendary twin killer (though you don’t want to), you lose the fight.
I was able to win every battle without luck 
sometimes my moves stuffed up but was able to come back on top in those battles
Managed to win the water fire one with most my team left
I stated that because I am the only person on this earth who has won these damn 9 (or 16) battles at least three times and just gave up from battle 5 for my fourth account, so I think I’ve got enough experience and data to support my statements.