Never really though about it.
Bottom. I used to line but I find it to be tedious. I love liquid lipsticks because I hate reapplying makeup. I don’t have time to primp mid day. I apply on the bottom, carry the color to the top, clean up around the cupids bow, set and go. It is the second to last step of my routine before setting spray.
What do you mean by “healthiest?” Are you avoiding certain ingredients, or just looking for clean beauty recommendations? Everyone’s skin is different so before I suggest anything I want to be sure I understand what you’re really looking for…