Nostalrius Begins - Quality wow vanilla realm (1.12)

I am trying for like 10 mins to log in, the character selection screen appeared after 5-7 minutes, loading screen is like 5 mins already, still not ingame. Serious lag issues, last night we had lag even in ZG, any solution please?

Last night ZG was absolutely old' way Vanilla epic lagcore.

To put a tiny resume :

*Raid Leader send "Ready Call", everyone accept*
*Jindo's fight start*
My charachter stay in combat mode, full rage but still frozen holding his weapons mid-air, "levitating" towards boss and totems.
*Typing : "Is it just me or is serv insanely laggy"*
5 min of fight pursue, still in capture motion, and not even one rage point was used that day.
Raid wipes.
*Walking in phantom form mid-way towards ZG*
[Krom]: Is it just me or is serv insanely laggy

But I got Zin'rock in the end, wich is nice
(altough I'm stuck now since 5 min in the charachter selection screen and 5 others in the progression bar to grade my 2H swords' skill up).

EDIT: This way I hope I'll be able to enjoy some nice PVP with my new wep' tonight, where Warlocks and Hunters blinks from lag. It's a melee sad life

I hugely respect and love dev's work towards I must admit the best WoW experience I had so far, having a blast and playing nearly everyday since day one, but something must be done at this point.

TL ; DR : lag forces me to have a life and it's not cool