I almost never use clip on splices or vampire splices as they are known, in fact there is debate that those actually hurt your wiring. I use bellcaps at work, because it is mandatory, on everything except alarm/remote starts, but they do work fine; I personally like to use the same way backinblack uses, been using that forever w/o any problems.
Tapping and splicing wires

I solder the splice then tape it up, and backinblack reccomends that on his site, but just incase you dont see that I thought I would tell you.

To answer your question I would do it in branches.

Backinblack, hope you aren't mad I used your site as a reference.
-steven-