Would you guys allow a spell mastered casting of the Magic Staff spells (EssCo) to be used on a pole arm? Something that's a wood staff with a metal axe, spear head, or blade...
No, I would not. However, I would allow it to be spell mastered down into a rod (treat as a mace for attacks) or baton (i.e. a wand; treat as a club for attacks). Essentially, since the item is being both created and enchanted as a spell casting focus, I think that retaining a relative simplicity of form is going to be required.
Additionally, a pole-arm does more damage than a staff, so allowing this would essentially be upping the power of the spell (never a good idea to allow, IMO).
You are specifically asking about using the list with items made out of multiple materials, and that is where a large portion of the problem lies.
This list specifically creates the staff from a
single material, nor does it require other processes (honing, sharpening) to complete the process (i.e. personally, I would rule that part of the casting process makes the items tougher than normal, so that such processes (i.e. sharpening) would not work). So while you could have a mage that makes a staff that looks like a pole-arm (made entirely of metal), it would still be a staff and work like one, IMO.
[oRule]
Whether or not the item is made of metal is of no consequence. The item becomes intrinsically tied to the caster (look at the consequences if it is destroyed, or if he tries to cast without using it), so that the staff would NOT count in a negative fashion for casting, regardless of what it is actually composed of.[/oRule]
NOTE: The above in blue refers specifically to the staff created by the magic staff spell, and is based on the wording of the spell itself, as well as the notes for the spell list.