Bill,

I use lots of weedguards on bass flies.

I only use the continuous loop method.

I try to use the absolute lightest material for the weedguard that will work. Usually 15 pound test is sufficient for most of my flies, while I may go up to 20 pound for heavier subsurface flies that may be thrown into really heavy cover. I use 'cheapy' mono from the big box store for this, as it's not as stiff as the 'hard mono' stuff and I hook more fish with it.

No bonefish experience, though. Did you ask the source that suggested this what kind of guards they are using?

Buddy