Black Mage Blizzard II (and other minor suggestions)

[Iscah]

But there's never a need for a Black Mage to be anywhere close to the action if the mechanics don't call for it.

There's never a need to be far away either, "if mechanics don't call for it" - it doesn't affect your spell potency, and potentially inconveniences your healer as they try to position themselves so everyone is within their AOE circle.

Stand far away enough to be out of the enemy's attack range. That's all that matters. Extra distance adds nothing.