Freeshafting versus Lineshafting
The epitomy of the KISS school of thought for spearfishing is freeshafting. Freeshafting is simply using a special shaft with a sharpened tip, not a threaded screw on tip, and a single flopper with no line attaching it to the gun. Due to the lower drag this shaft has it requires only a single band to power it while offering improved range and accuracy and shaft speed.
Freeshaft guns have 1 or 2 spare shafts mounted to the sides and can be reloaded very quickly allowing the shooter to land multiple fish in short order or put a second shaft in a fish that is still alittle green. The true secret to freeshafting is in taking highly selective shots that cross the fish at compound angles seriously injuring and disabling the fish if not "stoning" it outright. The trick is getting the fish to give you those angles based on your body language.
Staying 15' or more off the bottom and hovering yields far more productive results than bottom crawling ans actively swimming down a ledge or reef. This is because of your body language. Laid back free floating bubbleblower = no threat, while a bottom swimming bubble blower is clearly up to no good. If you don't think fish can read body language than leave your speargun behind for a camera and see how many more fish will approach you and let you approach them. Only AJs, hogfish and red grouper are curious or aggressive enough to let just anything come near them.
Freeshafting is ideal for bottom fish like groupers and snappers but less so for pelagics like AJs. If a freeshafted fish is not stoned or disabled it will obviously be able to swim dragging your shaft with it. Therefore as soon as your shot is fired you should either immediately begin to reload or charge straight at the wounded fish. Shooting and then sitting back to watch is the worst thing to do regardless of whether you are freeshafting of lineshafting. The fish is wounded and its thrashing is broadcasting that fact to the reef, and as it thrashes it is tearing its body on the shaft.
A lineshaft with tension on the back end (from a diver pulling the fish back to him/her) provides all the leverage the fish needs to tear off the shaft. It is far more effective to swim to the fish avoiding putting any pressure on the line unless absolutely necessary.