timing at 30 BTDC?!?!?!?!?!?!?!?!

I am running a 360 auto. My timming is set @12 advance idle. It still uses vacuum advance.

I see on a lot of posts guys are running sometimes 20 degrees at idle and still using vacuum advance. How is this possible? Won't it go over the "Hump"

What total timming should the 360 have?
ALso should I keep advancing base timming?

Car has poor power on the bottom and mid then starts to wake up at the top.

I am wondering if timming is the cure.
THanks for any help.