Spells tend to not have an arbritrary range in this setting.
Look, even ef we CAN dodge, simple math makes it not a risk that's worth it. We don't know the base damage of the spell, and given it's a level 5, I would peg it at at least 50 damage, with 75 being likely(and this doesn't even touch the Magic Mod). Not so bad, right? Especially since we cut that inb half with our resilience. Well, the AA ability on that means if we get tagged with that and we count as flying, we suddenly take a whopping 300 damage as that 50 base gets multiplied, which is our entire health pool! Worse if it's 75 base(which in that case its 450 damage,) and this doesn't even include bonus damage from the MM roll. We cannot, I repeat, CANNOT afford to be flying at any point of the fight, since it only takes one failed dodge to go up in smoke.
This isn't even including the other unknown ability of the spell, which could be anything.