If you're looking at a shallow seam, get out the beaks and start having fun. They're also crucial for hooking on dead heads and other fixed junk. The #3 seems to be of limited usefulness, I think 2-3 of the #1 and about 2 of the #2 should do for most racks. Oh yeah, don't look at them when you test the placement, unless you want a chipped tooth.
Clean aid monsters, bomber! Better than Beaks due to the opption to clip in direct or through the cable. I have used the biggest size to protect thin free routes.