Fighter/15th/Darknut

Truly Indomitable

Starting at 15th level, whenever you use your Indomitable feature and your new saving throw fails, you can expend 5 stamina points to succeed instead.

Snap Throw

At 15th level, you learn to put your momentum and strength into a forceful weapon throw. When a creature moves within 30 feet of you, you can use your reaction to throw a melee weapon you're wielding at that creature. Make a ranged weapon attack roll using Strength, including your proficiency bonus. A hit deals the weapon's normal damage using Strength, and reduces the target's speed to 0 until the start of your next turn.

Once you make a snap throw, you can't attempt another one until you finish a short or long rest.