[quote=Piercing Light]
Get rid of Depth of Water, and he's accepted. That's just too many genjutsu that can be stacked onto someone to render them helplessly debilitated. And on another note, make it so these genjutsu cannot be stacked at all, only one genjutsu that affects one's perception at a time. Also, he should need to use handsigns before using these genjutsu.
[/quote]

Done. Added what you asked, however may he stack a maximum of two Genjutsu at once using the Double False Surroundings technique? 

As per the background of a mercenary... I'm sure someone will eventually need his services, be it the Empire or the Rebels. Until then Seijuro is content as a wanderer.