A few observations... First, props to the artist for drawning this beautiful scenario, seriously the whole scenario gave a eerie, mysterious, romantic aura that befits a final dungeon, I can't wait to see when those people reach the door to another world, my mind probably will be blown.
Second, I hope those top parties are the real deal and not just some cannon fodders that soon enough will be useless so MC's party can shine more.
Third, no wonder Scordia is the current best party, I mean look at their lineup: Mage/Alchemist, Mage/Bandit, Knight/Monk, Warrior/Ranger, Monk/Spirit User. The most well rounded party ever.
And last, the villains party seems like they came directly from Fist of the North Star while the leader looks a bit like Kratos, maybe five of the hundreds of thousands bad guys killed by Kenshiro were lucky enough to isekai to this world, because they're all swole and even the shortest guy towers over Yoke by a great margin.