I think in weed that 'blowing the hook mid run', is where it hasn't penetrated past the point, and falls out, the hook may be masked by weed. A barbed hook is often worst for this, so a barbless or crimped barb hook can be a better hooker.
A size 6 is the smallest I would go, try Gardner Muggas or Solar 101's, on a Multi-rig.
I really don't like helicopter setups in weed, bite indication is 'slow', hookholds can be funny, and lost fish can be the result.
I've found that inline or pendant setups far better at hooking fish.