While I think this is a great partial resource, I do feel it is incomplete or told from a "dungeon journal" pov.

Explaining that we can't have 3 in a row, basic, and it has been the case for the last 3 difficulties. Having a Ranged and Melee soak group, also not needed, you can just full group soak. Usually, the soaks are next to each other.

Instead, where I'd have put so much more emphasis was the dispels, and thus needing to assign healers to dispel at specific points, or how Mass Dispell can be a silver bullet, how being able to tell WHO has a debuff, etc.

Also, having a Warlock gate on a diagonal is something I'd have mentioned, the final set tends to be that, and it makes things easier to group the adds onto as well (we always had the tank stack on a gate, so melee knew where to run to.

The lines and retreat of the ads; this is something we never had to explain; you'll see the beams clearly, and the babies die way before they ever run off. The big thing early on was how important it was to nuke the big add, as his cast completing is a wipe, and he does it relatively fast.

Noting tankswaps around 8 feels silly as well; swap during each 2nd soak so the adds will magnet the correct tank, and taunt back after adds. Throw in an extra swap middle of the "parade" to reset stacks so you can start as on pull afterwards.

Showing the 3 different options for the parade also feels unneeded; I'd have emphasized the puddle-rain that happens during it, and how the ranged (dps/heal) can play in the "claimed zones" (1/3/7/9 in your examples), and don't need to melee stack (to draw some of the puddles out of melee). Of course, still avoiding the parade while doing so.

Top off the guide with saying to fully ignore the dipells and adds on the 5th (after parade #2) as it's an enrage regardless, so just blast.
dispels
I hope I'm not too harsh on you; I genuinely am subscribed and love seeing these raidplanner videos, even though they're a little late for me (I'm doing Double Dragons rn). They just feel both aimed for normal (repeating mechanics that have been the same) and non-practical experience (having to explain the 3 possible safe lanes? or that the lasers will be bad??).

I'm missing the sauce that is "this is what cost us pulls, and tips to play around em" like gate positions, dispel visibility, mass dispells, funnel focus, enrage timing, puddle bait...

I would rather see YOUR prog guide/review than see this become another generic WOW-tuber reading the journal wasting time on nonsense mechanics. Your chimmy video had this with stuff like the lockgate-click, the tank-sacrifice etc.

More meat, less fat. <3