problem on Mob Arena

So there is some problems on mob arena about the character "mage":
mage is like a witch, so you have a lot of bad potions and a flint and steel and and wooden sword.
1. you cant light the mobs with flint and steel because every time you try it says, "you dont have permission for this area!"
2.the potions only work on day light mobs, like spider, creepers, slimes, etc.
3. i was a mage, i had the wooden sword, but then it broke ;-; so i had no weapon.
wanting to make ma more osm!!~

best regards,