I'm going to run a 4th Tier One-Shot very soon, I have told all my players to build a 20th level character. One player built a powerful artificer (armorer subclass) that outshines every other PC, I will provide his saves, AC and so on:
- Strength: +13
- Dexterity: +7
- Constitution: +17
- Intellogence: +19
- Wisdom: +16
- Charisma: +6
Temporary HP: 20
Spell DC save: 20
Spell attack bonus: +12
I am perplexed and, to be frank, a little frightened by those saves, the AC too. I have also double checked his character sheet and nothing is wrong or miscalculated.
Should I nerf this build? If Yes, how?
I did not know well this class, I think I made an error allowing it, didn't I?
How would you balance this situation?
PS: I'd like to specify that I am NOT a long experienced DM, I have run other epic level one-shots before and those went fine, but I clearly lack of experience.
PPS: if necessary I'll post the complete character sheet.
EDIT: the one-shot has gone pretty crazy but, despite what I initially thought, the Artificer was pretty underpowered. He was certainly tough, but his output damage was totally fine.