Yeah your absolutely right, I tried out a few swings with a few different scythes on magus and it infact looks like he's swinging a staff, if you pay attention. However, the attack he did on Lavos was personalized by square because magus' normal attack looks nothing like what he did to Lavos. Also, I find it kind of hard to believe that a mistake would be made on arguable the most important cut scene of the game. So, I'm still kind of up in the air on the situation and thinking that maybe something got lost (or added) in the translation. But great catch anyways, the fact that his normal scythe isn't largely different from the pole he's swinging at lavos makes the scene at least less curious.