Aaah yess. The POB thingy again. I think this will be a neverending discussion when related to competitive online games since everyone does something different, and yet there are the "unspoken rules" of viability.
Now to the question itself and why I think it was closed:
The original Question was a wall of text with a bad title. After the question got 3 close votes, it was edited 2 times to make it more readable/understandable. But the question still got closed. Why? Well many people don't know how far questions about "Viability" in a game like League are accurately answerable.
In competitive online games basically everything related to gameplay is subjective. So should questions about these topics be prohibited in general? I think not. An experienced League player will be able to answer good subjective questions. This question is a good subjective Question. In general I think questions about Viability and Strategy are good subjective questions. Of course they will be more complex to answer but they can still be accurate. In this case of this Question you can create an answer based on the 3 Main aspects of Competitive gaming: Calculating the stats, Watching statistics and Playing the Game. And this Answer will be accurrate.
The question shouldn't be closed as primarily opinion based. It is answerable based on facts and the main problem with POB questions is that there can't be a single answer. This is not the case here. This is also not the case with "viability" questions in general. Strategy questions are more subjective than viability ones and those are explicitly allowed on this site.