Save a PC, Burning Edge to Stay Alive. Possible GM House Rules? Options

[SincereAgape]

So our gaming group embarked on the ever dangerous track of beginning a Ghost Cartels Campaign this past Sunday night. Those of you who have read the sourcebook know that the PCs will encounter heavy resistance and serious NPC "mojo." There is a good chance PCs will die, no matter how nice of a GM you are (I tend to fall in this category for various reasons, having only killed one player character in over a dozen sessions).

SR 4.0 states that players are able to burn edge to survive a incident which would result in their demise. Now some of the player characters in the story have edge points over 3 or 4. As a GM who often times sacrifices killing blows for the sake of a story, and is often shy to pull a trigger (Personal philosophy = that the PCs are there to have fun. Especially the casual player. They are there to escape from the stresses of the real world, and as a result are looking for an atmosphere where they could stick it to the man, vent frustrations, have fun, and leave behind their problems at home. Getting shot in the head, or having a character die adds some stress, especially if it's a character they have a lot of passion for. End rant). It's kind of silly in my opinion to have a character who has more lives then a neutered cat.

To the fellow lurkers and posters on dumpshock, what are house rules that have been employed or are current in practice which replace the burn one edge to save a life rule? I am thinking about three scenarios.

1. Use the Primer Runner rule. If a player wants to survive a death blow, they burn all of their edge and are only allowed to do this once in their runner's career.

2. Dead is dead. You can't burn edge to save a PC's life.

3. Buring two edge points instead of one.

Ghost Cartels. Still won't be gunning for people, but if the squishy mage, hacker, technomancer, or adapt takes a 15P pistol shot from a yakuza assassin or a sniper shot from a random FBI agent. They are going down.