i don't think she would have made good boss. by that time in the story she's just a frail old woman. i mean she got chased off a cliff by a bunch of dwarfs for pete's sake >.>
That's only a disguise. If she were really that old she wouldn't have been able to run as far as she did in the movie. I've had ideas for how the fight(s) would've played out for years.
Queen Grimhilde-Her normal form
Music: Vim & Vigor
Setting: her hidden lab
Attack 1: Downward stab with the dagger originally wielded by the hunter
Attack 2: Throws explosive vials of acid
Attack 3: Sics her crow on the player (similar to Shun Yu's hawk)
Spell 1: Pours a vial over herself which turns her invisible for a while (can not be locked-on)
Spell 2: Pours a vial over herself that casts a forcefield around her for a short while
Special event: Knocks over a table, spilling acid over a large section of the floor
Mountain chase
Music: Rowdy Rumble
Setting: The mountainside
Not really a boss fight but a chase sequence. Every so often a barrier cuts the player off & he has to fight some unverse to make it go away. She'll also occasionally push boulders towards the player.
Old Hag-Immediately follows the chase scene
Music: The Encounter
Setting: Cliff
Attack 1: Swipes with her long nails
Attack 2: Throws an apple which inflicts poison status
Hazard 1: Lightning bolts, there's a lot of them to avoid
Hazard 2: Rain puddles to slip on
Special event: A heavy wind blows the player over the edge of the cliff. The player is barely hanging on & must preform a reaction command to climb back up while Grimhilde attempts to stomp on the player's fingers.