Locks should be wispy at the tips. It helps them dry faster. If they are blunted it canliterallyadd hours to your drying time. If you want the lock to knot faster you could put beads on them. But bands should never be used. If you feel like there's absolutely nothing else you can use, I'll tell you what... Let them hang free as much as you can. When you wash them, put the bands on the tips just to secure them, but as soon as they dry, take the bands off. It wont help as much as you think it will, and you'll be going through bands like crazy, but keeping bands in your hair long term can cause a lot of damage. First it will pull out hairs that should be kept in your locks. Second It will cause weak spots where they are tighter than they should be. Third, if any part of a broken band get stuck in your hair, it can degrade and start to rot there.
Using small beads is a much more effective and desirable way to keep locks looking neater and much cooler