if you leave everything as the official patch, you will have full abyss player in 3 months, and those players will leave the game in 6 months, because they will have nothing to do anymore. In conclusion I tell you the most important points.
1) Siege and bastion rewards of half compared to the official server.
2) Forcing players to play in battle medal sets, for at least 6 months 1 year with less chance of making ceranium.
3) Enter serums only through events, but at least one year after the server is opened
4) insert the double manastones one year after opening the server.
5) create two markets on the site web, 1 for euro and 1 for battle medal. For example, the possibility of exchanging on the site, a medal battle number for an enchant, or for a manastone and for a mount or for a box for extend weapon. In this way the katalam would always be alive
make sense, at the arena set, set abyss 60 and 50, and battle medal set. You can give importance to those sets only if you give half of the ceranium rewards in the siege and bastion. The players are selfish, resetting the points to the legion will not change anything, the only possibility you have for making the server last for a long time is to make the final set very difficult
If you leave everything as it is now, or as the official, the server will last a maximum of 6 months, then it will become empty.
the changes I ask you to make are easy, because I know that modifying the game is impossible