Well elysium devs made a critical mistake by underestimating the amount of players. The solution was given like 8 years ago on servers like wowcircle and other. Different realmlists for different realms. Different login servers. Problem solved. Now when all 20-30k people are slamming the authorization server it will only get worse until they replace the hardware with better one. This literally means the problem will probably remain for a long time here. Try other vanilla projects for better experience until the problem is solved