1. It does give status resistance, but IIRC, it gives about 1/3 resistance of the other stats (Like, 1/3 resistance to stun as compared to Vit, 1/3 as compared to Int). It adds ATK, but hardly, Luk's only use comes from Crits and Perfect dodges.
2. Not going to bother.
3. When you use a certain weapon type vs a certain size type, there is a loss of ATK in %. For example, knives do 75% vs Demi-human, but not in damage, only ATK. Like, 100 ATK would become 75 ATK. Which is why it's the worst MvP card in the game.
4. Optimizing builds/custom stuff/weapons/etc.
5. Equipment build?