Depend on what you mean with "independent" I guess :-)
Disarming someone with an attack seem to either cost you 5 Edge points (if you take it as an Edge Action) or 4 Dice to Hit (if you take it as a Minor Action).
Aiming for vulnerable/unprotected parts seem to either cost you 5 Edge points (if you take it as an Edge Action, in which case it increase damage by 3) or 4 Dice to Hit (if you take it as a Minor Action, in which case it increase damage by 2).
Firing out of full cover seem to either cost you 2 Edge points (if you take it as an Edge Action) or 2 Dice to Hit (if you take it as a Minor Action).