Guess I'll start on the classes. First is the barbarian. Like every class, some abilities are standard and others are only if you choose a particular subclass. For barbarian, we have berserker and totem warrior in the PHB.
Rage is much too strong.
- Drop advantage on strength checks and strength saving throws. Instead apply the melee damage bonus to each of these.
- Keep bonus to melee damage, but give a -2 penalty to AC while raging.
- Reduce resistance to bludgeoning, piercing, and slashing damage to damage reduction 3 vs. these attacks.
Unarmored defense, reckless attack, danger sense, extra attack, fast movement, and feral instinct are acceptable.
Brutal critical is much too strong.
- Make the character confirm the critical for the extra damage, once for one additional die, twice for two, and thrice for three. So for a 13th level barbarian to do x4 damage, the hit has to be confirmed twice. That means a reroll where you just have to hit, not roll a natural 20.
Relentless rage, persistent rage, indomitable might, and primal champion are fine.
For the berserker now, frenzy, mindless rage, and intimidating presence are fine. Retaliation is too strong. Change it to once per day.
For the totem warrior, the rituals are fine.
At 3rd level, reduce the bear power to damage reduction 3 vs. all attacks except psychic, keep the eagle power, and change the wolf power to gives all allies get a +2 bonus to hit for one round only out of the battle.
At 6th level, each power can only be used for one minute per day.
At 14th level, the bear power needs to work differently, too. The enemy you are attacking while raging can be attacked with advantage by you if it attacks someone else. The eagle power is fine. The wolf power can only knock a creature prone if it fails a strength saving throw.
That was a lot of work. I don't know when I'll get to it, but the bard will be next.
