Re: Cleric Variant: The Celebrant
To me it looks more like an ACF than a new base class.
Trade armor proficiency for CHA to AC? Hmm, can have its use.
Trade BAB for extra skill and skill points? Ok, not bad. Consider if you're playing low lvl (choose BAB) or high level (choose skills).
Flavoring wise you left a fine joke, label him the Party Face, which hints at the joyful event and the group.
I wouldn't play one, except when spellcasting would be keyed of CHA.
My personal folder is a graveyard of ideas, stuck in their dream phase.
The "DM won't kill us" attitude is a bubble that sometimes needs to be bursted.
There's an armor variant rule in UA that will drastically increase character survivability without completely bubble-wrapping them in plot invulnerability