D&D 5E (2024) So, what does the Artificer "replace"?

[Horwath]

I liked the mechanics behind Samurai. I'm not sure if we could realistically translate it to 5e24 without it being underpowered, since advantage is so much more common now, though I think it might be worth considering how to update the subclass to 2024. Its was a fun subclass.

more usages, maybe add that you can spend Second wind if you run out.
temp HP could be healing 1st and then leftover as temp HP.

add that you can make one weapon attack as part of Bonus action activating fighting spirit.
adding +1d8 damage to each attack during fighting spirit is an option.

expanding critical to 19-20 at levels 15 or 18.