Man I lost a big ol post so I guess I'll recast the offering.
Wgt. & hook size is dependent on what size shark swims in to the slick.
12-14 wgt & 6/0-8/0 for around up to 150 lbs. 14-16 wgt. & 10/0 for above.
I tied up the equivalent of 6/0 tiemco 600SP (the difference being this latest version is black nickel finish)
The flies were a rush order. The synthetics were what used to be called Hairabou and I think is now call Big Fish Hair. I also had what may have been sample 16" red synthetic hank. No label or mfg. This stuff gave the needed length. Tied more in the body of the fly was Icelandic sheep and I finished off the head with rabbit strip. Eyes are important. I used 3/8 turned aluminum and usually 3d stick on which I epoxied in or halo stick ons which set in the recess.
I tied flash in at various points. I guess the 6/0-8/0 flies should be 6-8" long and the 10/0 10" to whatever you think you can throw.
Make sure you have a reel with a quality drag as these guys (makos) can hit speeds of 35 mph and they will shatter a drag on the run. Good luck and post some pics if you hookup, although video is the best way to go.
All the fish caught with the 6/0's were 120 or less which I would venture to guess is more the norm. They had a big boy check them out from a distance and he never came in close enough to tease.