When the mage hits the boss, first put a clay figurine (clay figurine can slow down the opponent's speed), then give the boss a time limit, and then the undead army will surround him. You hide in the back, keep aging and kill boss with a bone spear. If the undead army dies a lot, the first act will be sent to the cold wasteland and then a regiment will be summoned to continue to go back and ravage the boss.
After the wizard passes through the customs, give priority to the wizard to bring out the witch and bless the paladin (you can also set up a virtual router and bring more yourself without going online separately).
People usually choose necromancer, witch and blessing paladin as the most important roles in land reclamation.
Trap assassins are a little soft in hell, especially when they kill the fourth act of hell and 3bb. Because there are too many elemental immune monsters.