The inherent flaw with Ardent Censor
All other items designed to give enchanters extra power
all are equally powerful when used on just about any ally (for Mikael's it's assuming they're currently CC'd). However, with
the item only really benefits TWO classes (Marksman and Skirmishers). This would be fine in most cases since it would mean the item is simply niche and team comp specific. The problem though is that Marksman are required in every team comp of every game in some form, and Ardent Censor synergizes so powerfully with Marksman that it becomes a necessity for any Enchanter support to rush the item as core, which again isn't bad in theory. BUT, enchanter supports who are meant to support their entire team become incentivized to focus solely on the marksman for heals and shields since they would otherwise be wasting huge amounts of potential gold in power should they heal/shield another team member who can't utilize the bonuses of Ardent nearly as well. This creates an awkward playstyle of the support only working for the Marksman rather than for the team because it would feel bad to not utilize an item to its full potential.
Should the idea of ardent censor be kept (buff allies through healing/shielding) then Riot must consider a type of buff from Ardent that will benefit just about any class equally.