I don’t see your whole scpheel the entire game is like this.
When you get 5 levels under the mob you start taking a lot more damage because you’re effectively giving them an attack bonus.
Spiral arrow is a multiplier attack. It takes their attack, adds a multiplier after.
If you’ve already reduced their attack to 1 or 0 beforehand then 1 times a 1.8 modifier for instance is still 1 damage rounded down.
The mobs have what around 600 attack. If you’re 5 levels under than you’ll be boosting that, and that boost gets affected by the multiplier of spiral arrow.
The map is level 222.
And at level 222 you will not suffer increased damage from the archers because 3 levels above does not trigger an increased damage penalty.
This isn’t new, even in the level 20 map in Klaipedia’s side, there were regular spion archers with Spiral arrow and they hurts too, 200 levels later, you’re fighting a stronger version. Be at the level you’re supposed to be, if you’re using a 1h class, equip a shield when travelling solo. If you’re in a party then your party members can soak up the damage instead.
You can take them at lower levels but then you have to use active defense tools. Con is a garbage answer to the problem, The amount of investment you need to make to make CoN a legitimate solution is far greater than the investment of just putting on the right equip and being level 221 or higher.
People get one-shot in missions when they find themselves 15 levels under the boss. Solution to it becomes to dodge since every attack in those fights can be actively avoided. Archer’s can’t be so easily avoided so you try to directly mitigate their damage via the defense/evasion stats, crowd control or defensive skills.
The game intentionally tries to bar your progress by making operations outside of a specific level range become rather difficult until you reach that level range.