>>1820513
Blazing Wind BGullveig could charge herself on the first hit, nuke with the second and bring Ike down to 1 HP, and then get danced for the third to kill him. While also having killed two other units.
If you used units or seals to precharge her, she could do it in just two actions because of Gold Unwinding.
If you REALLY knew what you were doing, she'd do it all in a single hit where she has zero support, only an AoE inherited, and using her standard Blade Session seal on the hardest difficulty.