Honestly, the game borrows some elements from norse mythology but it doesn't try to strictly follow it (see golems, lox, deathsquitos, fulings, etc..). To search for a "higher mythological sense" at every corner is the wrong approach to it (...or at least a waste of effort).

As to Moder, the fight with her is not as hard as it is tedious. And yes, if there are a couple golems and other spawn points in close proximity the fight can be a lot harder than if it is not the case. Last time i fought her, it was a long fight (about 20 mins) but there were no golems around, i only've been disturbed by 3 drakes in the process.