I'm kind of glad you found they worked well (although you should really notice Daev's other factors might be involved point) given you have to blow points on an edge which will only help you when you fight a specific class. If your class doesn't have a bunch of class-specific edges yet, these might have been your only options. In a completed edge world you're opportunity cost for that is an edge that could help you in 100% of your fights. I think Valg and Daev have both made this point more eloquently, but to paraphrase Daev...if suddenly assassins are all the rage then some anti-assassin-skill edge could be a total bargain, but if you pick it and then never fight an assassin it wasn't a deal.