You know, originally I thought it would be hard to conceptualize more different types of attacks for Sage that aren't just more of the same lasers over and over, but scrolling through that FF8 video, there are really great animations where you could take inspiration...

Some Examples:
Link A
Link B
Link C
Link D (Similiar to the other example of a water beam)
Link E

Just to name a few. There's also quite a few different takes on vibration attacks as well. This one's nice and flashy, and the sound effects in this one are kinda fun.