Well, than a better example is when Valkyrie kills Jin, since she basically just cut him to pieces and either he never even got his weapon out or she ignored it and did him in anyhow. The main reason I bring it up is because of the earlier speech Reiji has with Sakura when she first shows up, saying that if his HP hits 0 before he can use Da Capo, it doesn't matter if his MP was 0 or not; therefore I took away that it is possible to die via direct damage.
Also, I think that Full Access was faster than Dainsleif from what I remember seeing, the effects were just delayed or something. I may have to go back and reread that point.
Since FSN is a good comparision point in almost every point here, let's say that the magical weapon is a Servant, and a mage is a Master.
...Well, hard to use that as a direct term since both mages and magical weapons are hard to destroy/kill, but it gives you the point of two targets.