First of all, when and howoften does medusa spawn and gates open? Secondly, pls make jangan teleports available at hotan teleporter.
Here is a suggestion for making server a little more fun. Have a medusa unique quest similar to flame cow king quest where the players with quest who kills medusa get rewarded randomly with CTF coins, Arena coins, or Job coins (you can choose what reward you want). The reward should be random like flame cow king but should drop everytime. This quest can be done infinite times because medusa doesn't spawn as often and it takes like 3h to kill it. Also, maybe lower medusa HP. Let me know if this possible for your team to do.