well i started play lineage 2 on substuck Dragon-Network,and my opinion if you really wanna succed try make a srv like this:
1.rates 100-150x
2.npc buffer just with 2nd class buffs no dance/song,buffs 30 min,dance/song 10 min,vop/cov 5min,and you will make useful subs like bd,sws,wc,bcz on substack you can make a nice pt if you know
3.subclass just same race,only dwarf can sub anything
4.gm shop only A grade,S grade only by killing raid bosses or donation
5.no custom zones,bcz on every srv are same sh1ty zones
6.grand bosses zone auto flag zone,so there will be pvp
7.make 4-5 custom bosses who drop item necesary to make sub,with a respawn of 6 hours,they must drop 1-2 items
well this is my opinion,i wish you gl with your project,and think about mutants they will unbalance more the game,best is same race