I'm having trouble with this as well. I have Naked Lunch and Shroom, but I'm not that impressed with either one. I'd like to try some more smoky eye looks with burgundy, black, green, blues, etc. A MAC MA said I could use concealer one shade lighter than my skin for a highlighter. That technique works, but sometimes I want a subtle shimmer on my browbone. I hope we can get some good ideas in this thread. For me, it's fine if it's a non-MAC highlighter.