MAGIC!

Clerics are among the most diverse and interest classes in 5e DnD. Because your choice of Divine Domain so greatly affects your capabilities, Clerics can fit a variety of roles and play styles. More generally, Clerics are the best healers in the game, and have among the best support, utility, and divination options in the game.

d8 hit points is good for a full caster, but it can be problematic since many Clerics fight on the front lines. Fortunately, Clerics have the best healing abilities in the game, so they can easily compensate for a small pool of hit points.

Medium armor and shields will give you a decent AC, especially if you're not building for melee combat. Simple weapons will be fine, especially once your spells eclipse your damage output with weapons. Clerics don't get any tools, and get two skills from a very short list of options.

Druids are a very versatile class. Moon Druids emphasize Wild Shape, making them excellent Defenders, Scouts, or Strikers depending on what form they take. The Druid spell list allows them to serve as Controllers, Strikers, Support casters, and Utility casters. Land Druids lack the Moon Druid's ability to dive into melee, but gain improved spellcasting capacity, and retain the ability to use Wild Shape for scouting.

d8 hit points is good for a full caster.

Medium armor and shields should give you a decent AC, but since you can't use metal armor the best you can use is Studded Leather and a shield for a total of 14+dex. Your weapon proficiencies really don't matter.

Sorcerers are a challenge. They lack the versatility of a Wizard, but share many of the same capabilities, and almost all of the same spells. Where the Wizard is powerful because they own a tool for every problem, the Sorcerer is powerful because they own a few good tools and can use them to fix any problem. Sorcerers also make one of the best Face's in the game due to their skill list and dependence on Charisma. The Sorcerer's spell list allows them to serve as a Blaster, Controller, Striker, and Utility Caster.

d6 hit points is the lowest in the game, so be sure to take enough Constitution to compensate.

No armor or shields, and only the most basic weapons, but the Sorcerer skill list contains all of the Face skills, including Insight.

The Warlock is likely the easiest of any spellcaster to play. You get only a handful of spell slots at a time, and never have to juggle multiple spell slot levels. Warlocks have a list of spells known, so you don't need to worry about changing your spells on a daily basis. Warlocks also get the most powerful damage cantrip in the game, giving them a solid, reliable option for violence in between your big spells.

The Warlock typically fills the party's Wizard-equivalent requirement, offering options as a Controler and Striker, and with some minor investments the Warlock can also serve as the party's Face. The Warlock falls a bit short in terms of Utility spell options, but that can be mitigated with Pact of the Tome and a few Invocation choices if your party can't compensate for that shortcoming.

d8 hit points is pretty good for a dedicated spellcaster.

Light armor and simple weapons are fine since you definitely won't use weapons, but the skill list is frustrating. You get two skills and access to a couple of Face skills, but most of your non-Face skills are Intelligence-based.

The Wizard is the iconic arcane spellcaster, capable of doing all manner of fantastic tricks, and generally limited only by their spellbook. A Wizard with a comprehensive spellbook can do essentially anything in the game, often as well as or better than a non-magical character who is built to do that thing. A Wizard with Invisibility is as stealthy as a Rogue. A Wizard with a summoned pet can replace a fighter (at least temporarily). A clever Wizard could even find a way to heal his allies and replace a Cleric.

Because Wizards can do so much so well, their roles are numerous and varied. However, in a typical party the Wizard's primary functions are as a Blaster, Striker, and Utility Caster.

d6 hit points is the lowest in the game. Fortunately Intelligence is the only ability which Wizards strictly need, so you can afford a decent Constitution score.

Wizard's weapons are pitiful, but can be easily replaced by cantrips. Unfortunately Wizards only get two skills.