Does "reduced damage taken from damage over time" reduce Labyrinth traps?

Uhm, tbh i really think armor helps here, doesnt it ?

Well, i mean, it should helps against everything that does include a hit mechanic, this should includes also the darts that coming from the ground. The other darts are chaos damage, arent they? Or is it splitted damage ? Then armor should work there as well.

Armour does mitigate the damage from traps that deal hits (like floor spikes etc.). A quick example test: 6k life as a base. With 12k armour spikes hit me for roughly 1.0-1.1k damage. With 28k armour they only hit me for about 700 damage. The difference is very noticeable and consistent/repeatable.