As I did not get a sufficient answer in rules section, I try it here:
My question is explicetly about the following ability:
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At 3rd level, when a phalanx soldier wields a shield, he can use any polearm or spear of his size as a one-handed weapon.
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In case a Magus would wield a shield, would a polearm be a one-handed weapon as required for Spell Combat?
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To use this ability, the magus must have one hand free (even if the spell being cast does not have somatic components), while wielding a light or one-handed melee weapon in the other hand.
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If so, which of the following scenarios would allow the magus to Spell Combat with a polearm:
a) A hexblade using prehensile hair to wield a shield, while spell combating with a free hand + polearm
b) A Magus using a buckler and spell combating with a polearm
