Also you can take a part here. I'll made numbers in every idea and you will discribe it how you will want to do it/ to see it.
1. Rates
EXP/SP should be set on x100. Why? 'Cause exping's boring at medium rate also on an Interlude server. About DROP/SPOIL I don't know. They'd customized. In my opinion they'd set that higher as you want. Dropped/spoiled items count won't be high, because items will be easy to get. Clear?
2. Enchants
It's difficult to set it perfect for everyone's. But in my opinion, as we can see on other servers, these rates and setup will be the best for everyone. For weapons safe enchant should be set on +3, but maximum enchant will be set on +16. About enchant of armors it's that same with safe, so it'll be +3 and +4 for full armors, but maximum enchant will be +8. Rate of enchanting should be really low. Not impossible to grow up but lower than on rest of servers. For weapons'd be set on 50%, but with blessed enchant on 75%. Armor enchant rate should be set on 66% (that same with jewels) and blessed on 75% too. Getting enchant should be really difficult. No one will enchant tones of weapons or armors and made it on best. It should be getting by Oly (but really hard to get) or by drop (from RBs) or by collecting many custom drops. Blessed that same as normal but w/o collecting.
3. NPCs
Needed NPCs:
Buffer - with 2nd prof buffs (SE/PP/EE and BD/SWS), w/o buffs from 3rd prof. Time of buffs should be set on 2-3 hours. Only summon buffs like retail.
Armor Shop - there you'll find all armors. D/C/B Grades you'll buy by adena. Prices will be low cause you need it to better farm. A and S Grades can be created by special drops and adena, then you'll need to unsealed it.
Weapon Shop - that same as in Armor Shop. D/C/B Grades easy to get to. Of course with SA (you will pay some adena for it). A and S Grades can be created and you will pay for SA too.
Grocery Shop - all potions, consunables, soulshots, arrows and all other tones of needed items you'll find here. Prices won't be so high.
4. Custom Items
There should be deleted all of normal drops and should be switched with new and better. There will be dropped by mobs/rbs also can be spoiled. They'd called: Animal Skull, Animal Feather, Animal Claw and Soul Stone, Holy Blood, Royal Diamond (I can also add custom icons for it). I post here examples of name. Can be other. This items will be needed to create A/S Gears and for Enchants (maybe). There'll be other custom items. I want to see Raid Token Fragment(s) and Raid Token. Fragments'll get from Raid Bosses (70+ lvl) and exchanged for Raid Token. By Tokens you'll buy Clan Items. Maybe Enchant and other goods too. And there will be Armor and Weapon Fragments. They'll need to create armors and be drop like other items. There'll be custom recipes too. For A/S Grade Gears. Why? Because all of classes will be used on this server and items who's created by craft have decreased count of items by 30%.
5. Bosses and Grand Bosses
All bosses with 70 lvl will be increased to 80 lvl and will have custom drop (Tokens/Weaps/Armors/Custom Items). Bosses from 40 lvl to 69 lvl will drop Tokens and other goods to but it will be lower. Grand Bosses will be increased to 80 lvl with customized power/hp/etc. They'll have custom respawn time and custom list of drop. Bosses from Subclass and Noblesse Quests will be noted later, but they'll stronger too.
6. Special Zones
Grounds up to 52+ lvl will be boosted for faster exp. After this time you will enter Special Zones. I will post here propositions of it.
61-76 - there you will get first custom items and you will start collect it for A Grade Gears. It should be ACM or EF (only one).
76+ - here you will get more items for A/S Grades and collect quest items for 3rd class (will be noted). It should be Mithril Mines/MoS/FoG/EF/SoDA (one of these).
Party Zone - there your party will get more items for A/S Grade Gears, also you'll get here piece of armors, weapons and jewels. Mobs will be really strong. It should be PI/Beasts Farm/IT/MM/HS (only one).
7. Custom Quests
3rd Class Quest - you will collect 500 items (100% of drop). Can be get on 76+ and Party Zone(s) (all party members will get it).
Subclass Quest - you will need to kill ToI's Raid Bosses (boosted) and buy special item (buyable at Shop).
Noblesse Quest - retail like quest, but quest items drop's set at 100%. Barakiel will be boosted and after death will drop special box (like Subclass Raids), whose'll give you last Caradine's Letter.
There we're! I post, as fast as I can, my suggestions for long life-time server, who also can growing up with chronicles. There tones of players will spend a lot of time on farming but in time they'll get time for PVPs, Sieges and etc. I can explain all of points better.