Homebrew
Superiority Dice. The droid has four superiority dice, which are d8s. A superiority die is expended when it uses it. The droid regains all of its expended superiority dice when it finishes a short or long rest. Saving Throws. Some of its maneuvers require its target to make a saving throw to resist the maneuver's effects. The saving throw DC is calculated as follows: Maneuver save DC = 8 + the droid's proficiency bonus + the droid's Strength or Dexterity modifier (DM choice) Feinting Attack. The droid can expend one superiority die and use a bonus action on its turn to feint, choosing one creature within 1 meter of it as its target. The droid has advantage on its next attack roll against that creature this turn. If that attack hits, add the superiority die to the attack's damage roll. Parry. When another creature damages the droid with a melee attack, it can use its reaction and expend one superiority die to reduce the damage by the number the droid rolls on its superiority die + its Dexterity modifier. Precision Attack. When the droid makes a weapon attack roll against a creature, the droid can expend one superiority die to add it to the roll. The droid can use this maneuver before or after making the attack roll, but before any effects of the attack are applied. Riposte. When a creature misses the droid with a melee attack, the droid can use its reaction and expend one superiority die to make a melee weapon attack against the creature. If the droid hits, it adds the superiority die to the attack's damage roll.
Multiattack. The droid makes two melee attacks. Punch. Melee Weapon Attack: +5 to hit, reach 1 meter, one target. Hit: 9 (1d10+5) bludgeoning damage Claw. Melee Weapon Attack: +5 to hit, reach 1 meter, one target. Hit: 9 (1d10+5) slashing damage Drill. Melee Weapon Attack: +5 to hit, reach 1 meter, one target. Hit: 9 (1d10+5) piercing damage