Yeah I was wondering too about the no suppressors on shotguns and revolvers thing. For me there are three stages when it comes to plague hearts.There are four stages to a plague Heart
Assault: this is when you arrive for the first or other time you show up
1st phase: gas is released and zeds spawn outside
2nd phase: just like the first but the heart is almost out
near death: a few zeds just spawn trying to stop you
destroyed: all plague zeds die from the heart.
Screamers are like gunshots, yet they're ineffective because the scream circle only activates in the beginning and the end instead of always.
no suppressors on revolvers or shotgun?
Stage one: try to avoid them because they scary asf
Stage two: find powerful sniper
Stage three: plague hearts dont scare me anymore