The point of the eni revamp was to make it so eni aren't always force to be pure int heal bots. Now enis have options and any eni build can be a healer.
Int is your straight forward healer that heals the most out of the builds, but can still deal high damage with puzzling word.
Chance deals high damage but in mid range to close combat range. This is good however since chance spells heal 50% of the damage 2 cells around the target.
Agi is more ranged and utility focus kind of. Air spells heal 50% of the damage 2 cells around the eni. Probably the worst eni build, but still good for hybrid enis.
Most enis end game are either pure int or chance/int/agi and use atcham set.