Board Thread:Off Topic Discussion/@comment-5428123-20131108095318/@comment-5428123-20140213091233

One at a time is fine. In fact you don't even need to enhance before limit breaking, since the card levels as your limit break. As well, when you limit break, you actually contribute to your card's skill level. When I limit broke my Ryo Sol to the max, it's skill levels when up to 12 at the final stage.