Mob Arena

Mob arena is the oldest and hardest minigame on the server.

Coins
This minigame usually considered the best minigame to get coins in, and it is the only minigame that has Single Player Compatibility.

You get coins every wave or so, and in the Nether Mob Arena you get 2x.

Popularity
If you enjoy fighting monsters for glorious prizes or just the sheer thrill of battle, you and your friends can now join forces against hordes of Minecraft evils in the exciting gladiator-style survival mini-game, MobArena!

-Mob Arena Plugin Page

This minigame is the oldest and least played because of it's extreme difficulty and low player limits. It is, however, an alternative to PvP or PvP training with players.