If there are 2 Plague Doctor in a party,they use Incineration or Plague Vapours at the same time,does the skill’s damage status stacks each other?or the skill’s damage status replaces each other?
They replace each other.
oh no 
, is this a bug ?
No, it’s just how debuffs in this game work
so what should i do if there are 2 plague doctor in a party and there is only 1 target(boss,…)in dungeon ?
Wow, plague doctor isn’t OP yet, the following step is creating a poll asking to buff that class.
Wait for the other PD’s incineration to end before using yours