I will say where me and Innue differ is that I won't allow you to charge multiple spells in the same around. I won't even do it with Kei'Taro and his tattoos. What I will allow, however, is beginning to charge one on one turn,and in the next locking it and charging another, as I do with Kei'taro
.

For example

Kei charges Thunderbird. 

Next turn

Satisfied with the one cycle, Kei switches his energies to charging Kusanagi, setting up a potentially fatal combination move between his two abilities.