I think a melee stance would be nice for flavor. It could temporarily convert our verspells into elemental melee spells for a temporary dps increase with the downside of putting you in melee range for 8~16 secs basically a cooldown secondary version of our burst (melee) phase but locked behind a cooldown rather than our job resource. Here is an example:

Ability: Spellblade
Cooldown: 90~180
Effect: Convert Verthunder, aero, fire, stone into Enthunder, aero, fire, stone, increasing the potency of the spells by X% for X seconds or until enchanted melee combo is used.

Of course if mystic knight is coming magical attacks would fit them better.