That is too complex, and it invlves calls, which are a terrible idea. The person who invented calls should be shot in the face and left in the desert.
The big issue here is a matter of weapon power. I want all weapons to deal 1 damage. It may feel inaccurate, but when you consider weapon length- 95% of the time, a person with a dagger is going to die when facing a person with a longsword. Plain and simple. It doesn't matter that they do the same amount of damage, you're not going to be able to hit your opponent with a dagger if they have a sword as tall as they are. Unless they /really/ suck.
Frankly, large number are just way too complex to manage when you're dealing with 7 body parts. I don't want to have to stop and think "ok, I was just hit in the chest with that +2 hammer, and a while ago in the left arm by the normal arrow (1), and then I took 2 hits from a +3 sword to the torso, etc". It's a pain, ruins immersion, and just ruins the fun of it all.
Thought I posted this, but I guess it didn't go through. Why is a wizard, a master of arcane secrets and hidden knowledge, going to go out looking for blood, guts, and glory? We're not talking a battlemage here. Sure, a wizard could do decently questing with spells like sleeping, paralysis, etc. But in the setting this is designed for, that's not really going to happen much.