Have you ever noticed the same thing??? Even some characters who are considered mages like Alhazred for example...after a certain level where you can have your weapons up to 16 level,and some of them have 3 free rune slots available their physical attacks are stronger than their magic.
In Alhazred's case...i had a rage rune and a magical rune attached on him and when he casted the final flame spell with sorcery formation,he could go for...3,5k per enemy (which means 1,7k without the chain magic)
Then,i put him out these runes and attached him a double-edge,a power and a boost one.
With these runes his main damage could be 1,7k (as good as his final flame spell)....and if he goes for critical hit then it would be 3,5k (final flame with sorcery's chain magic).
Surprisingly Alhazred can get a 2nd blow sometimes,and if you are lucky (chances are very low of course...about 1%)....he could go up for 10k damage with his book...believe it or not!!!
So,my question is why magic fades away,after a certain point of the game....and why you cannot make it more powerful like physical attacks?
PS. I've always been a fan of magic in Suikoden series...and i prefer using it more than physical attacks