Cleric 2 is a personal choice, you can support a team without it, but it takes a lot of coordination and focus. One party member who eats all of your 5 tiles because they fell to 50% hp is really frustrating.
I’m currently a Chap->Druid (almost Druid2) and I do fine at healing a party. Yes, they have to pot sometimes, no they will not be 100% all the time. Yes, they do need to understand how Mass Heal works and not run away when they need healing.
Druid2 also gets Sterea Trofh which sort of replaces Cleric2 upgraded Safety Zone.
Chap->Druid2 is fun, but you are not a main support, or a main dps, or a main healer. But you can do all 3, its really fun tbh.