Lucifer wanted to merge his attacks, planning to increase his strength even more.
He knew that if he could at least merge two of his powers together, starting from the ones that could easily be merged, he could then move over to the harder ones.
That's why he wanted to merge his wind and his lightning when attacking.
Both his skills had different advantages which could certainly complement each other.
His lightning was fast and dominating. It could destroy anything it hit. On the other hand, his wind was swift yet versatile.
Wind attacks could easily be controlled, and their trajectory could be changed mid-way. That wasn't possible for lighting.
Lightning was so dominating that it was impossible to change its direction once the attack was made. Lightning could destroy anything in its path, but it was useless if the attack was dodged.