I just got my WBBB and superfly 6 weeks ago. Yes, there are 12 tie out points plus the 2 on the ridge line. I have used my hammock and tarp 5 times now.
The obvious ones that you need to use are the two on the ridgeline, and then I would suggest the four corners .
You do not need to tie the 4 door spots down to stakes, but I would suggest doing something with them to keep them from flapping in the wind. If it is windy and cold tie them to the ground or to the opposite corner like on brandon's video. If you want them out of the way tie them together across the length of the tarp, but on the inside. One of the pictures on the warbonnet website has this shown though it is not clear because the picture is from the outside of the tarp.
As far as the last four tie out points go, they are on the sides of the tarp about 1/3 of the way from the sides. I would only bother with these if it was raining or windy. Some of Shugs videos show how you can use these as does brandon's setup video for the superfly, but his video seems to be for an older model with removable doors though this should not affect the topic of these side tieouts.
After a few outings I have swapped the line that I use to tie the tarp down with. I started with 50 ft of orange cord from rei. It worked well, but it was too bulky. I then tried braided masons line from homedepot, which has no bulk. If you get this be sure to get braided not twisted. The masons line does tangle so storing it can be an issue. Now I am using masons line for all 12 tiedowns but the ridgeline. For that I bought a tarp ridgeline setup from arrowhead equipment, which I have yet to try in the field.