Seems good! I'd also have some ideas for such server. I've been working on my own 7.72 realmap-based highrate server for a long time now (more of a hobby, dunno if we'll ever release it, though).
My server is based on Danera 7.6, which was quite successful in many measures in the past. However, we learned that normal 7.6 or 7.72 version of Tibia doesn't really fit, as it is, for a highrate long term OT server. People will get bored and quit pretty fast. Therefor I started to develop some new areas and quests for Danera, and people really loved them!
We already had Pits of Inferno quest, similar to real Tibia one. I made also a new quest for level 150+, which was similar to Pits of Inferno or Inquisition quest, and a lot harder than Pits of Inferno. Then I replaced Draconia pyramid (useless area in oldschool highrate servers) with a completely new and hard quest, which also needed at least 16 players to enter (enterance similar to Annihilator).
Also one of the recent new things I made, was an NPC who sells all the blessings at one after a player has completed PoI quest. If I remember right, PoI had 100 or 120+ level requirement, and ofc the blessings were a little more expensive than from the normal places. This same NPC also gave you 5 tasks, where you have to bring a certain item back to him. I made 5 new boss monsters in different distant locations like Chor, PoI quest area, Mintwallin, Fibula etc. each of these bosses dropped a very rare but useless item for the task. Also, they were very hard or some even impossible to solo, therefor people needed a small team to hunt for the task items.
All kinds of these new things keeps the playing more interesting. In old Tibia versions there are just a few hunting places and things to do, goals to achieve. Normal 7.72 Tibia you'd get level 100+, make DHQ and Annihilator and that's it. Nothing else to do than exp, and there's no reason for exping anymore, since there is nothing new anymore. And where will you exp? Demona Warlocks is probably the only place, but there are tons of high levels players who all wants to hunt there. Same goes with Edron Demons. Those are probably the only 2 places worth hunting at on like 150+ master sorcerer on oldschool server.
So, remember to build places, quests, hunting areas (or replace some useless ones with new monsters), new tasks or missions to complete etc... Something to do, new goals to achieve, new quest which gives you the motivation and reason to take those levels and keep on playing.
Just some of my own opinions.
Good luck with the server, will definately give it a try!