A while ago, I got my brother to start playing Fire Emblem Heroes.
When I encouraged him to play Aether Raids, something interesting happened.
I didn’t know that if you’re in a low tier of Aether Raids, you get a massive fort level advantage.
That leads to really amazing stats!
Just take a look at these screenshots of his units. Note that they aren’t merged, because my brother is also free to play, by the way. They are also not summoner supported.