In my personal opinion i think its a good idea to add duels so its easier for new players and players in general to practice since kb in hive is a bit different
Example of duels they can add
-Gapple
-Pot pvp, but since hive doesnt use potion maybe replace the instant health potion with the spell of life book. Plus its also not stackable which makes it more suitable as a replacement for the potion.
-UHC type duels, and again since hive doesnt use buckets maybe replace them with flint and steel and cobweb
-Normal duels, which include snowballs, blocks and bow
I know you can just make customserver for this but it would be easier to fight againts players and just practice with the hive kb