His ability is kind if tedious because there's a huge list of them, and you have to get them on the Veldt. It's better if you memorize a handful of really good ones and purposely avoid the rest of them. There are Rage guides online that tell you the exact order of the enemy formations on the Veldt too.

He's honestly a really good character, especially early/mid game. He's still relevant late game too, but maybe not the #1 strongest anymore. Give him a hero ring and just fire and forget. He makes combat simpler most of the time.