Boosting Attacks
Fire and Air Glyph both boost attacks, but to what extend? Since it is not Ranged+X, can I use Fire Glyph on zone attacks like Voltaic Discharge to roll 2 extra dice against all creatures in zone? Or will it only work against one? Or not at all?
What of sweeping and double strike attacks?
In Arena those will boost only single attack of an attack action. Academy doesn't make distinction between attack and attack action, but definition of Doublestrike and Sweeping mention
second attack. So it's separate attack and doesn't benefit from glyphs used on the first attack IMO.
Zone attacks aren't precise in their definition. Rules doesn't explicitly say if it's single attack with multiple rolls or multiple separate attacks.
These spells will attack every creature in the play area (and every conjuration in future expansions), including yours! Roll for each object separately, one at a time, in any order you wish.