"Defeating a champion is not a trivial task. At the very least, it requires three well-coordinated players, but it is more easily done in a group of five or six players".
Hmm - Designed for 5 or 6 and they call it SOLO / SMALL Scale. The majority of the content already in the game is for 5+ and Merlyn is not an exception.
City Heart Fragments: can be used as a stand in to replace 8.3 (or any) resource. Will that bring the zergs to the RC? I think so.