XD No, thankfully no.
I solo the instance with my GX. The HP is ridiculous, yeah, but the damage you can dish is super high. I can finish within the time the VIP buffs expire. Just wear unfrozen armor (I like taking wind because of the fight with the Necromancer's first form). For the fight, just don't let the mobs live too long. They will continue spawning and they will hurt very much. The archers are the easiest to forget :v Go out, RC them and CRS the boss, which I can dish 400-500k CRS to the boss XD Feels good seeing those numbers.
I use +12 Thanatos Katar [AK], Fire Converter, Eddga, and dish Rolling Cutters of 70-80k, so the fight goes quite smoothly.