Optimal strategy to catch them all using the least number of points

No.14357242 ViewReplyOriginalReport
Rolling is obviously better, at first, than selecting a specific one, but once you have almost all of them, on average it's cheaper to select specific ones because if you roll it's very likely that you will get emoticons that you already have and you will have wasted your points.

The question is, at which point does it make sense to switch from rolling to specific?