1: ♂️ who knows.
2: The power level of Mjolnir, Gungnir and Hatvager are similar, the three being one of the most powerful weapons in all pantheons, equalled by Poseidon’s Trident, Zeus’ Lightning Bolt and Pangu’s Ax, but still below Shiva’s weapons. Either way, they have earth shattering power, Mjolnir being able to manipulate the weather, Hatvager the oceans and sea, and Gungnir holding a portion of the Odin-Force.
3: I’m currently updating The Wolverine book, but it doesn’t mean I won’t update this, I already started writing the 2nd part of Thyrm’s story.
4: No, Vatin embodies the seas of Asgard and Lake Vattern, meanwhile Njord embodies the seas of Vanaheim, but Ægir is the embodiment of the very concept of water itself, also having his own realm which is filled with water right below Midgard, and embodies the seas in Scandinavia, nevertheless, the gods in Norse Realm are equally as powerful, especially since their role is practically to replace this embodiments, Vatin is destined to replace Ægir after his murder, also disconnecting Rán, and Vatin already killed Logi, the embodiment of fire, though Vatin is unsure who replaced Logi, not counting Surtur who is already the embodiment of Primordial Fire.