For this kind of shit, you need to think about it slightly differently than a pulley injury, and I've a word of caution for ya.
There's varying evidence for finger taping for pulley injuries. Much of it crap, much of it done on out-of-the-freezer dead bodies. But the idea is that you can support the tendons etc. by supporting and replacing the action of the injured pulley using tape. To do this you tape hard in the right place.
For a collateral ligament injury, this is different: you've damaged the ligaments that hold the joint stable, not those that allow the tendon to pull effectively. What you're trying to do with your tape here is to tape it such that it resists further injury with side to side and twisting injuries. This is much much harder to do than the regular taping.
Crimping is a shit idea. As the finger bends hard, when you then apply irregular force on it (such as one finger being a big longer, your body being slightly to the side, or whatnot) then you get a sideways shearing force on the finger. This puts strain on that lateral ligament.
My recommendation is to avoid crimping, and buddy tape it to it's neighbour, tight. Use the neighbour to support it from those shearing forces in other words.
Just taping in a figure eight will do next to fuck all unfortunately, IMO.
Oh, and that word of caution: if you don't listen to your body, nob it up, then you'll end up damaging the joint further, probably rupturing the capsule, and you'll end up with a ganglion on the side of your finger.