"Reduced damage taken from bosses" could also work against players

This may be a silly suggestion but the status "X% reduced damage taken from bosses" could also work against players.

Damage in Core Keeper grows a lot while armor doesn't, which works very well in PvE where the bosses can have as much health as needed. But in PvP, players will never have that much health, making a tank/bruiser/melee build very bad against a DPS that can run from you and deal one hit K.O. (critical chance + chance of triple damage).

Taking in count that a Player can deal as much damage (or more) than a boss can, would be a little fair to reduce it damage like it was a boss.

So my suggestion is to change the status to "X% reduced damage taken from bosses/players" for the items:
- Sentry Helm
- Stone Chestplate
- Stone Pants
- Ancient Guardian Necklace
- Ancient Guardian Ring
- Turtle Shell
- This could become a shield

This wouldn't make PvP perfect because even with this changes the player would probably still take a lot of damage from others players.