I am more or less in the same situation as you. I pulled a 5* Samurai Eddie, but all my other toons are still at 4*. What I'm doing right now is upgrading talismans and using fellow troopers with 5* allies to farm runes. I decided to ignore Lord of Light dungeons at the moment, as getting 3* evo shards is getting painful. I must admit I'm getting a bit annoyed, but my characters are getting stronger. Just patience.