I only found the information on Maguro.one that states the safety zone on DoN is much bigger than what you actually discover in the game and should cover all the base with 4 exits.
Has Maguro mentioned anywhere else they reduced this particular SZ?
I went over the interaction of Purifier Beam and Safety Zones in my last Bug Hunt. Essentially, if the Purifier Beam is targeting a unit, it can go inside, but not too close to minerals and starting locations. Thatâs why North-East entrance is not safe (images in the post).
https://www.maguro.one/2019/10/bug-hunt-8.html#PurifierBeamSafetyZones
Good catch. Yes they do. I added a note on my site.
Basically, all upgrades and effects that increase sight range work if they apply after the game starts. Normal Observer/Overseer siege mode is a morph into a different unit, and so it doesnât give vision during Afraid of the Dark.
2 Likes
Great mutation for Swann this week.
My ally took Vorazun and went for void rays to hunt the buildings (night and day). I made a line of CCâs at the back of the camp for vision and asked my ally to cloak them. Worked really well.
Infestors where outside the tank range and later on some spotters messed up the cloaking a bit. However No problem for mister Swann. Had 60% structure hp and a bunch of SCV behind the CCâs to repair. Funny to see 4 scvâs out repair a whole bunch of angry infested 
Swann 1 Amon 0 
5 Likes
Make sure to also build Zeratulâs Constructs Bay. Lots of Zeratulâs unit abilities wonât take effect without it.
And people say the PF wouldnât see use if they gave it to Swann.
4 Likes
FWIW, some have said thatâs ALL people would do⌠build a wall of them to block off chokes and other areas. Then again, Kerrigan already does this with her Omega Worms.
Stukovâs Queen ability too can counter âafraid of the darkâ. It gives +5 vision range to any unit for 180 seconds (+detection), that is almost for the entire day/night. And if you cast it on sieged Zeratulâs observers, they give almost normal vision.
4 Likes
Novaâs Ravens have passive radaring on mini-map.
It greatly helps on this mutation to check for forgotten huts. Or even finding bonus.
They need to increase the speed of the purifier beams by bit cuz its like they dont even exist
Iâm pretty sure you are slightly mistaken or misspoke.
Novaâs hero unit (with detection upgrade) has passive radar.
Han & Hornerâs Ravens have passive radar.
Novaâs Ravens do not have passive radar.
Can be real annoying for poor Stukov if they stop at an entrance. 
Ya, it H&H, not Nova