1- Chronicle: Gracia Epilogue, considering the fact that there are many Lineage II Players looking for at least a decent Gracia Epilogue server would bring a good amount of people into your server, of course you have to advertise it correctly and promote it via banners in vote sites, if you want to have a serious project and not another lol server. In addition Gracia Epilogue, in my point of view at least, is the most stable pack made by L2J and there are many well-known bugs posted through the forum (Since you are VIP member you can access all of them, learn about them and fix them just by using search). Also if you have a past expirience of an Epilogue server you can solve some issues with skills, bugs etc faster.
2- Server Rates: Maybe x1000 or x2000 EXP rate would be fine. I mean a PvP Server. Well about the enchant rate, I would suggest you 75% Normal Enchant rate and like 95% of the Blessed. Well if you make the enchant part too easy, the players may get bored and leave faster as you may expect them to leave, but here the balance counts as well. Attribute level up to 7 (or 9 I don't remember which is the max) and the chances hm let's say 65%.
3- How many farm zones: 3 Farm Zones. Cursed Village, Parnassus, Anomic Foundry or Execution Grounds. Please don't add any PvP Area, use the Farm areas as pvp zones, would be better for everyone, I think.
4- Would u like Nexus Engine event? I have no idea what Nexus Engine event is. Give me an explaination.
5- Custom Stuff? Armors / Wepons: No way, it will ruin the game play and it will make it looks like star wars. Most players need a simple Gracia Epilogue server. So I say no.
6- Implementation of new recipes?: No, I don't like it and I am against it.
7- Sieges / Territories / Olympiad times + duration: Sieges/Territories, well Sieges can be like this: 9 Castles, 9 Territories. 4 Castles (Giran, Rune, Aden, Gludio) can take place on Saturday, 16:00, 18:00, 20:00, 21:00 | 5 Castles on Sunday (Schuttgart, Goddard, Innadril, Dion) 14:00, 16:00, 20:00, 21:00 so each clan will be able to help their alliances. Territories can take place while there are no sieges, so if you put sieges each 2 weeks then the territories can take place during the break of the siege period. Olympiad, hm let it be as it is.
8- And other things. Nothing to add. I hope that I helped you.
Regards.