Server I finished Yagluth (rip lox dropfarm and sky base vs 5 summonings) on went in Frost Caves with Troll Hide and barely any access to Frost Resistance potions at that point. Dealing with the enemies you just have to play smart and slow making use of ranged attacks for aggroing or dealing heavy sneak attack damage and use the terrain to your advantage. Stagbreaker is really good in getting rid of pesky bats which can be dangerous if you die and have to get your body back in which case bats can then be kinda scary lol. Also use wood arrows or flint arrows at that point.

Early Fenris armor is nice for the movement speed, decent armor and the frost resistance - which at that point in making the first item for said resistance you should have frost resistance potions for easier traversal in the mountains rather then just lucking out.

Braziers are good for getting comfort level 2 and breaking doors can get Iron bars for early stonecutter + forge improvement since you just need 2. Access to a bit more comfort increases with jute and perhaps braziers as well can also be nice.

Late game I'd rely on 2 root armor pieces and 1 fenris armor for the pierce, poison and frost resistance - you can use the lox/wolf cape or potions but at that point I was using linen. Pierce resistance from root armor is super useful in plains vs spear chuckers and sneaky deathsquitos.

Also be sure to run around mountains with a workbench / portal that you can easily set up in the entrance of said caves - usually won't get destroyed.