ronaldsf
Explorer
Traps in PF2 hit above their weight class because they're balanced to be "speed bumps" that the party follows up with about of healing. If a simple trap figures as part of an encounter, I include complex trap XP instead of simple trap XP which is 80% lower, and I include it in the Encounter's math.
That said, while the phantasmal killer trap adhered to the guidelines for a Level 10 trap, it did NOT have the effect of being a "speed bump" like most traps. For level 8 characters, there is no easy way to come back from death.
So I question the wisdom of placing an instakill trap tuned to 2 higher levels than the party. Plus, particularly severe effects merit lower DCs according to the guidelines.
That said, while the phantasmal killer trap adhered to the guidelines for a Level 10 trap, it did NOT have the effect of being a "speed bump" like most traps. For level 8 characters, there is no easy way to come back from death.
So I question the wisdom of placing an instakill trap tuned to 2 higher levels than the party. Plus, particularly severe effects merit lower DCs according to the guidelines.