I noticed that not a lot of donators go on the assassination server because they don't get advantages.You could add ender chests at the shops and donators can use them.And maybe it could go like this because you got the rank only once you get coins and every day when you come on you get that amount.iron 15 coins.lapiz 25 coins.gold 25 coins (but they can use command heal every 15min.diamond 25 coins (can use command heal every 10 min).emerald 25 coins (use command heal every 7 min but every week they get free things varying the time they where on assination 24hours iron sword and iron hat and chest (dought anyone will get) 15 hours gets an iron hat and iron sword.10hours gets him 1 iron sword.5hours gets a stone sword and full chain.and lastly 1hr 30mim Gets you full chain.and obsidian gets you everything from emerald but 1 free tamed wolf a week.I think is will attract more people to donate I tried to not make overpowered.(off topic when I go on I'm gold but I get a glitch and it makes me stone rank only on that server)