If you're doing 2 pins a week try something like this:
week 1: left delt monday, right delt thursday
week 2: left quad monday, right quad thursday
week 3: left glute monday, right glute thursday
etc...
So if your cycle is 12 weeks then each muscle is only getting pinned 4 times total.
On my next cycle im planning to stay on for a long time doing periods of EOD injections and will be pinning delts, quads, pecs, lats, biceps, triceps, glutes... that way everything will stay fairly fresh.