Alright, so I'm making a campaign setting with a friend that involves 20 parties of four running through a dungeon. There are 20 levels in the dungeon, and on each floor the parties will adventure until one of them dies, at which point they will be extracted. Anyways, as we have 19 npc parties of four that means 76 npc characters, which is a lot, more so as to toughen them we're using pc rules to make them (max hp at first level, pc wealth, traits). We've named them, given them a colour scheme and noted which classes will be there but even pulling an iconic here and there we still need some help for a lot of npc parties. The first party I thought of is something like this, with four clerics as a team called 'Scarlet Guidance' and a silver/red colour scheme. How would you make a four cleric party with 20pt buy and other pc characteristics?
Nah, that was just some background as to why I want an all cleric party of npcs, sorry for the confusion. It's just supposed to be first level, although an idea of where they would be heading is fine as well.
1st level is where they're starting; we don't have individual motivations as of yet but we do have group motivations if you don't mind a bit of backstory
You'll want one guy who crashes in thru the door first. Crusader archetype, the heaviest armour & shield they can afford, probably the Steel Soul feat. This cleric plans to cast only between fights as he'll have his hands full during. His later feats might include Toughness or Fortified Armor Training.
Then there's one to deal some damage. A two handed weapon & the Forgemaster archetype, they're going to prepare a lot of lead blades spells. Channel Smite sounds like a good feat, later they can go for Power Attack.
Someone to buff the others - an Evangelist with Improved Initiative to get the buffs in first. Lingering Performance is probably the next feat. This one will use a reach weapon and focuses on support.
Finally they might have someone who gets Selective Channelling and a ranged weapon and stays in the back of the party. They might get Point Blank shot next.
With that many NPCs I feel like the biggest problem will be figuring out gimmicks to help the players remember who is who. Depending on how seriously everybody wants to take this it might be fun to borrow from other IPs, e.g.:
Team Rocket: Three summoners and a catfolk meleee combatant
Team Avengers: a rage-focused barbarian, a fighter who two-hand wields his shield, a paladin with a hammer focus, and... not sure who the power armor class would be.
Team Shippuden: Four monks with wildly different specializations.
And so on.
As to your original question, I would think two or three clerics focused on reach tactics and summoning and one or two who focus on maxing out spellcasting would be a nice balance.