[quote=Letter Bee]
 The problem is that, as described, S and SS-level NPCs are invincible, even to a group of A-level PCs. I know, I know, this might just be a mistake, but I don't like it when I assume is the main enemy is, well, unfightable, even with a cohesive group with complementing abilities.
[/quote]

I don't think a SS-leveled NPC is necessarily unbeatable. One can have the power to destroy nations with a single look, and yet still get killed by a bullet to the head.

[quote=AcerRo]
Toss a sheet or two up. I see no reason why we can't have more people if everyone agrees with it.
[/quote]

My words exactly.