silent death is a hth perk, at this moment it doesnt work very well but i dont think the best solution would be to change it to throw perkim confused, why would u bother with throwing knifes and spears when u can get frag\plasma nades?
An AimCriplerThrower works pretty good, i mean, sure, you have shitty range, but with a 35-95% chance to crit and approx. a 3% chance to instakill with a thrown knife it more than makes up for the gap between the plasma nades, crippling someone with a flying knife feels badass...
Nah that's not it, a crippler may be better done with some SG weapons, greater range...