Thrust.

I suppose we'll find that out when someone attacks a physical resistant monster with one of the physical+elemental skills. If it's still considered 100% physical regardless of elements then maybe the distinction between "weak elemental" and "half physical half elemental" doesn't make sense.

It does 1 damage. Inferno does 1 damage to Bone Fish when they use weapon cancel. "Elemental" does not imply magical. Physical/magical and elements are completely separate of each other. Bowmasters possess no skills other than Three Snails that do any sort of magical damage.

F/P Compo and I/L compo are composite magical attacks of two elements.

Inferno/Blizzard are composite physical attacks of two elements. Just think of neutral as an element without weaknesses/resistances.