Do Miasma of Dull-Mindedness and Arkemyr's Wondrous Torment effect stack?

[Jaget80]

As title says.

 

I just realized I have actually no idea how attibutes penalties on enemies works.

 

My guess is only the highest would apply. 

[Loren Tyr]

Bonuses and penalties from active effects (this includes modals) all work the same way on yourself as on enemies, and indeed do not stack. The biggest bonus and biggest penalty apply, everything else is suppressed (they're still there though, should the bigger effect expire they kick in).

 

And when I say 'all', I mean... well, 'most'. Because some do actually stack somewhat. Stuff like hit-to-crit conversion chance does stack, though not additively (eg. two 50% chance effects combine to 75%, not 100%); as far as I know this applies to all 'chance' effects, I know it works the same for chance to interrupt on hit. Similarly, some effects are similar but still different, such as "+10 Deflection" and "+10 Deflection against melee attacks". Against a melee attack, that will net you +20 Deflection. Some are even more obscure, I think "+5 to all defenses except Deflection", "+5 to all defenses" and "+5 to Reflex" will all stack with each other (I'd have to check though).

[Jaget80]

Thank you for you thoughtfull answer.