Basicly every crafting skill that is used to craft a weapon or an armour part:
- bs and tailoring mostly but also
- tinkering (a few weapons)
- carpentry (wooden weapons, wooden armour and stonecrafting, which is part of carp)
- bow craft/fletching
- glassblowing (which is part of alchemy)
Besides that, not many gargoyles do you glass weapons, so having alchemy without arms lore usually is no big deal.