Shield Counter: (1d20+34)[46]
If that hits, your attack automatically misses.
If not, change Leading the Charge to Stance of Alacrity and use Fool's Strike.
(1d20+37)[38]
By my reading of Fool's Strike, you have to make a separate attack roll to oppose that, and I don't think the opposed roll would get the GDS bonus - it's not the attack roll for the maneuver.
If that fails, here's hoping for a natural 20 on Immortal Fortitude (use Zealous Surge if I don't get it the first time):
(1d20)[4]
(1d20)[16]
Edit: The dice hate me. You win, and I really want to see your character sheet.