The basic principles I've been taught to follow when using a pistol (or really any firearm) while searching or clearing a space as an individual or small team are the same both day and night: 1) keep the muzzle at low ready, 2) look high/low and left/right for threats by moving your head and eyes, 3) rush through funnels quickly with the firearm in retention position, 4) raise the muzzle to engage only when a threat is identified.
Large team tactics go beyond these principles, of course. And larger teams can use overwhelming speed and force, something that an individual or small team can't.
The use of a WM or hand-held light, doesn't change these basic principles for individuals. The use of a portable light does add to them, though. For example:
1) The searcher who uses a WML must learn to keep his eyes in the spill, rather than focus on the brightest part of the beam. Focusing on the brightest zone is a natural tendency, and training and practice is the only way to get over that.
2) The handheld light can be used like a WML (Rogers/Harries) but also has the advantage that it can be separated from the muzzle line to more completely illuminate zones where spill isn't adequate, say when looking through the hinge line of an open door, all without covering any non-threats that might be there.
3) Scan with the light, then turn it off, and move.
FL-NC, dynamic entries are challenging, there are dangerous people, and we all want the good guys to come home safely. But you've used some somewhat veiled language. Pull back the curtail a little. Are you saying that in your experience those who break down doors for a living in larger teams don't follow, or are exempt from following, these principles? Or do they just bend them (e.g. low ready means covering anything below the waist rather than in front of the toes)? Or do they follow them but are simply much faster at identifying and engaging threats? Or something else more nuanced?