Private servers are capped, we don't have the servers sources, that limit us a lot, for example some mobs have more hp than what our server files can handle that mean we need to reduce it, for skills of the new mobs we need to create them from scratch because it's a server based file, basically we can't do whatever we want, we are limited by the files we have even if on Eclipse we managed to increase the damage cap on server side, but not on client side so it's quite bugged on client.