Just to show that I did it, I beat one of the creator's of splinterlands, Yabapmatt, in a match while using a lower level team.
https://steemmonsters.com?p=battle&id=9f457c29075a843f604e31a3c5b9d8ddbc906b8b&ref=navorn
It's actually really surprising I didn't lose if you just look at the teams we both used, ignoring that I was up against Yabapmatt.