Centurion is the only champ I needed for foli and I still chose not to go for it. I even had the gems to purchase enough ancients to get close enough but I decided to save them for leveling up other champs. 

THE ONLY WAY we get Plarium to change is to decide not to invest money and resources into bogus events that are unrealistic and unreasonable. I can't even figure out their strategy, they didn't offer any void or sacred packs during the event. If they want people to spend money to complete the event, then why not offer some big-ticket shard packs? Instead it was $140 CAD for 41 ancients that didn't even get you halfway to centurion? It was almost as if they didn't want people to get centurion.