I try to keep most of the pressure on my middle finger. 3 under solves a lot of problems, but it creates some too. Something I've just began to pay attention to is the tendency of my ring finger to drag on the string. Because of the string angles, I think this is more of a problem with 3 under than split fingers.
After 20 years of shooting with a glove, I've started experimenting with a tab, mainly because all the best shooters seem to use tabs rather than gloves, and I wondered why. My shooting has improved in the short time I've been using a tab, and my thought is that my middle finger and ring finger come off the string more as a unit with a tab rather than individually with a glove, which makes me have a cleaner release.
It will take more experimentation before I convince myself to use a tab, since the tab feels awkward to me and I feel like I'm fumbling around when I load arrows. But if I continue to shoot better, I will probably get used to those things.