Hi
I use two loops, one each side, making use of the holes already present on the DUI TLS suit.
The back loop is for stuff I won't normally need, such as spare SMB, spare spool, snips, etc. and the front loop for the spool(s) I plan to use for jumps/safety or my main SMB, my main SMB being in the backplate pouch thingy, and line arrows, cookies if I am in a cave. I pack the back loop first, then the front loop on top for easy location.
My reasoning is that I can usually just take out the spool I need and leave everything else in the pocket, so someone doesn't come along and start clipping my stuff all over the place on deco
Andy