The very reason why Rafel worked on the Inferno Spear was so to put her past behind her. However, she was still unwilling to become Saleen's follower. She had no problem tagging along him, but she did not want to be bogged down by anything.
Saleen did not mind at all, as it was only a matter of signing a contract after all. If it had been in the past, he could have taken her unwillingness to be stemming from her, thinking Saleen to be beneath her. However, things were different at present. Rafel's powers were no longer even on par with Saleen anymore.
Other than ball lightning, which was a lightning spell that he created on his own, there was yet another level 13, two level 14, and four level 15 lightning magic added to his arsenal.
No. Five level 15 ones. Dance of the Lightning Snakes was something that would not have cost Saleen any lightning magic chords to pull after all.