Actually it does matter because the Dragonslayer cuts physical and magical materials simultaneously, by virtue of being a physical weapon imbued with astral properties.
You're still assuming that all magical things work the same way across all universes.
Actually, taking into consideration my lack of GM experience and the narrowness of my familiarity with the genre, I have decided that it's probably for the best if I don't push ahead with this idea.
I'm waiting... I'm not sure what I'm waiting for actually. I guess I wrote my post geared too much towards forcing interaction and thus backed myself into a corner.
*Allowing Original Characters as pilots *Allowing mecha from both Real and Super Robot franchises *On the fence about Tokusatsu mecha; might have to be evaluated on a case-by-case basis. Depends if you feel up to handling multiple characters.