Can elemental recharge be exercised anywhere, or does it require an especially elementally rich area?
In order to cast a spell, a mage must be holding their spell book and be in physical contact with their focus. Their focus could be a ring, amulet or other object that does not necessarily have to be “held”. As such, a weapon or other object could be held in the hand during spell casting.
A spellsword binds their focus to their chosen weapon as part of the process of becoming a spellsword. As such, as long as they are holding their weapon, they are in physical contact with their focus. In order to cast spells, they would need to be holding their spell book, unless they take the skill “battle casting”, which allows spells to be cast without holding a spell book. The skill also reduces the verbal component of the spells by a number of words and also changes the spell casting verbal, clearly showing their ability to cast without a spell book in hand.
Does elemental mastery stacks across different specialisms of the skill, reducing a spell cost by 1MP per skill for each relevant element used to cast a spell?
If a mage wears cloth armour, does it cost them more MP to cast a spell as it does for other spellcasters?
Mages only wear cloth armour because they cannot cast spells at all wearing anything heavier than cloth. Technically they could wear heavier armour but they would need to remove it before casting spells.
There are no penalties for casting spells whilst wearing cloth armour.