Hi Josh,
When aiming doggies on jigs I use one assist hook. I use both kevlar or zylon (most of the time zylon).
The length of assist hook vary between 1/3-1/2 of the length of metal jig. For me it is depend on the length of the metal jig itself.
I am using 100lbs-130lbs fluoro. Any center balance metal jig will do (assuming normal current).
Mind you, I never boated 10kg plus doggie
Last month, I attended Yoichi Mogi jigging seminar in Jakarta, he gave us one or two tricks about jigging doggies.
According to him we should run the trebles off the tail, but I forgot to ask about the size of the trebles. He used Smith CB Nagamasa 400 gr blue color when boated 90kg doggie with Nomad in 2008.
cheers,
Philips