Pretty good, Phil. You've got a great eye for cinematics (especially landscaping and angles). The spells look great, the combat is fair, but of course where this animation really shines is the particle effects you use throughout the animation, which look incredibly natural. The shields also looked really nice, especially with the polygonal look you gave them.
However, I feel that the spells used somewhat lacked variety. In particular, trademark spells such as Poison, Quake, Stun, Cure, Float, Invisible, and Mini were not used at all, while ice and fire-based magic were somewhat overused. All in all, most of the spells (aside from Doom, Meteor, and the ending summon) were things we've already seen in the original Final Fantasy; spells that are over a quarter century old! Of course, they look much better fully fleshed out in animation, but it could have used a bit more variety. You overworked yourself animating the same thing just a little too much.
Ultimately this is a pretty unique addition to the thousands of stick animations on Newgrounds, but it had a lot of potential that it never delivered on, unfortunately.