Harder battles?

sooo, are event battle difficulties based on your level or your dinos?
if it’s based of dinos… will the difficulty decrease if you sell your good dinos?

This is one of the most discussed topics in this forum. You can find very useful information here

and here
and here

To answer your question, absolutely YES, my battles became so incredibly hard that I had to sell a lot of my strongest dinos. After doing so I am back in the game and had no great problems with any battle from that point on. You can find what I did (what I had to do) in the second topic.

Hope it helps