I'm wondering how much damage a PC can deal reliably and repeatedly. Another way to phrase this is "what is the maximum damage a PC can always deal?"
Constraints:
- All content must be "official": No Unearthed Arcana, Twitter/Stream classes, or homebrew.
- Assume all limited resources have been expended. Infinite resources, such as a Wizard's Spell Mastery spell are perfectly alright.
- Assume neutral conditions: No winds or environmental effects, the enemy has no resistances or vulnerabilities unless a feature says otherwise (such as the Grave Cleric's Path to the Grave feature which notably is banned by the "limited resources" restriction).
- To avoid extensive issues, assume the target is a creature that neither benefits not hinders your procedure (for example: a construct is immune to some spells, if using those spells you may assume your target it not a construct)
- No RNG / chance based results (such as Wild Magic Surges or chaos bolt); similarly, assume you do not crit unless a feature says otherwise (such as the Rogue's Assassinate feature which notably is banned by the "limited resources" restriction).
- All damage dice rolls are minimized, this represents your minimum damage.
- No outside help, be that from other characters, magic items, or even mundane items, including weapons and foci / component pouches. (Summoned weapons such as Pact of the Blade's are a-okay so long as you could start every turn without the spectral weapon; bonded weapons are not allowed as that requires you to have found a specific weapon). Also you may not use Epic Boons.
- You may assume your character is being affected by zero conditions (it doesn't need to be that reliable). However, they can still die from six levels of exhaustion.
- You may assume your character does not need to sleep (it doesn't need to be that infinite) or at least suffers no penalties from lack of sleep (Xanathar's is optional after all)
- Your method cannot include self-inflicted damage as the method would not work if you had 1 HP. (If you can negate the damage you can use the method)
- Assume there is only one enemy (If you're attacking, there will always be at least one enemy, but you can't guarantee there being more than that).
- You may assume any attack roll hits and any saving throw is failed.
- This damage is measured on a per turn basis. You must be able to deal this damage every turn.
- You may use Point-Buy or the standard array.