The sixth sense I meant isn't a supernatural or an innate one. Its the kind you slowly build up with experience. Like if for example they didn't know who Savaniel was, they'd still notice the 'aura' he gives off through his movements or confidence. They'd understand the strength difference. That sorta thing, its not pinpoint accurate or a power level reader kind of thing but you know what I mean.

I was thinking 4 to 5, anything more is basically calling them extreme fodder material.