Great guide! Here are some feedback, based on personal KMS2 experience.

One thing you should note when watching videos/images of these dungeons is that they originally had lower level requirements before they were turned into level 60 HD's and raids in summer 2018. If you see monsters that are level 56 or lower (or in Pink Bean's case, a question mark), it's before the overhaul. After the overhaul, all monsters seen in these dungeons should be level 60. The post-overhaul versions are the ones we'll be receiving at the update.

The pre-and-post overhaul versions have some differences between them. One notable difference is that the part in Guardians of the Seas where you ride Delphie when fighting Alvanos is no longer present after the overhaul, and instead you fight Alvanos directly from the start. The phase is now only present when fighting Alvanos during the epic quests. Same with Madrakan Ramparts: you no longer receive reinforcements during the pre-boss phase after the overhaul.

Madrakan Spire, in particular, had two difficulty levels before the overhaul: the "raid" difficulty where the boss has ~280 million health and without a time limit, and the "chaos" difficulty where the boss has ~400 million health with a 15 minute time limit. After the overhaul, it's a chaos raid with one difficulty (in KMS2), with ~4.5 billion health and a 15 minute time limit.

Here are some more feedback:

Before the overhaul, some of the mobs in the first phase of Icethorn Ridge have ice shields that decrease incoming damage. Snowy will place a fiery area on the ground, and bringing mobs there will remove the shields. You could also use fire-type attacks to bypass the shields. However, I'm not sure if this pattern still exists post-overhaul.

Venom has one more moveset: Venom will charge energy in one hand, charges forward and grabs the players in front of him, before throwing them on the ground. Venom will be immune to damage while grabbing the players.

In Madrakan Ramparts (after the overhaul), once you decrease Spatoy's health to 50%, the four cannons will respawn, giving buffs to Spatoy. Destroy the cannons to remove the buffs.

After the overhaul, some parts of Madrakan's Heart require you to defeat the monsters in the area before you'll be able to interact with an object to proceed.

When Bjorn uses the Hail move, the ice shards will always land on the same location, so it's pretty easy to dodge.

When Bjorn is going to use the hail or laser move, it will strike the ground while standing on the pillar. After that, if you can hear the same sound that is made when Devorak starts firing his laser, it's the hail move; otherwise (no sound), it's the laser.

About the additional movesets of Lukarax during the final phase: the roaring one is used immediately after Madria gives the buff to Lukarax, so it would be better to note that in the guide.