DesEuler's page

Im looking at rolling a group of enemies together citing the following rule.

The GM rolls initiative for anyone other than the player characters in the encounter. If these include a number of identical creatures, the GM could roll once for the group as a whole and have them take their turns within the group in any order. However, this can make battles less predictable and more dangerous, so the GM might want to roll initiative for some or all creatures individually unless it’s too much of a burden.

Mechanically, this is slightly better than rolling for each enemy, then delaying until they can all act together and could make for some interesting ambush dynamics.

But I am unsure of how this interacts with Avoid Notice or Stealth for Initiative.
The only thing I can find discouraging this is the Quiet Allies feat which lets the players roll a group Stealth roll but specifically says it does not apply to initiative rolls. So the system seems to want to discourage this.

Can anyone provide any concrete rules that either allow or prohibit Avoid Notice group iniative rolls?

I want to poll some opinions on rolling a single initiative for a group of enemies when the enemies are a coordinated unit.

The rule supporting this is in

The GM rolls initiative for anyone other than the player characters in the encounter. If these include a number of identical creatures, the GM could roll once for the group as a whole and have them take their turns within the group in any order. However, this can make battles less predictable and more dangerous, so the GM might want to roll initiative for some or all creatures individually unless it’s too much of a burden.

Mechanically, this is as if the enemies rolled and all delayed until they were ready to act together; however, they only roll once instead of rolling X number of times taking the lowest, so this is technically a tad better for the enemies.

I am particularly interested in Pathfinder Society play ramifications.