If I'm not wrong, Aion 4.3 was the last Emulator which was developed by Magenik. Magenik was one of
the best developer since Aion 2.5.
He coded the first IngameShop and the Windstreams.
After that, there was no other professional development group, except Aion-Core, from 4.7 to 5.0.
After 5.0 the best developer group was Aion Unity and Archsoft, but they was closed development.
AionGermany was a very good developer group also, but unfortunately their emulator never passed a stage
of 60% in terms of reliability to go live and host hunderds of player.
Also, Rinzler aka Encom, is a very good developer, but unfortunately he was always alone, he didn't got the environment that his emulator get the chance to be tested and get more developers feedback and ideas.
Finaly in my opinion the best Aion emulator developer, SuneC, (NotAion) was with us only in the Aion X Emu, 2.1, and then he never participated to common development.
What I want to say is, that without a structured, organized development and without real JAVA programmers, you will never get a stable emulator. Without a structured development you can not build a master emulator build with very strong standards, which need to be respected by everybody. That is the reason, that many "one man" developers changed previous Aion-Lightning standards, in (core) services, drops, questEngine,
geodata, but also in (datapack) quest writing ,AI, Instances and XML parsing data.
If you want a decent Aion emulator, you will need to take one of the older one, which was developed by a group.
In that case Aion 2.7, 3.9, 4.3, 4.7.5.18 from GiGatR00n. Otherwise, you will not find a complete developed emulator.
Maybe a Encom 5.8, but with missing quest, instances and AI. Same with Encom 7.5-7.7 or Falke's 7.2.