Used a bugbear chief as my base then modified it appropriately with android traits. I also have an extra line in my statistics as I use speed factor initiative in my campaign so its just a quick reference for me during the game.
Medium humanoid (android), chaotic evil
Str 20 (+5) Dex 15 (+2) Con 14 (+2)
Int 4 (-3) Wis 12 (+1) Cha 6 (-3)
Skills Intimidation +2, Stealth +6, Survival +3
Damage Resistances bludgeoning, piercing, and slashing from nonmagical weapons that aren’t adamantine.
Damage Immunities force, necrotic, poison, psychic
Damage Vulnerabilities lightening
Condition Immunities charmed, frightened, paralyzed, petrified, poisoned, stunned
Senses Darkvision 60 ft., passive Perception 11
Challenge 3 (700 XP)
Brute. A melee weapon deals one extra die of its damage when the deformed android hits with it (included in the attack).
Deformed. Due to the timeworn nature of the foundry where it was created, this android is deformed. Its ability score modifiers are different from normal androids as a result: +4 Str, +2 Dex, –6 Int, –2 Cha.
Emotionless. Androids have problems processing emotions properly, and thus have advantage on any mind or morale based effect.
Gift of the Machine God. As a creature of technology a deformed android gains many damage and condition residences and immunities but they are also susceptible to electrical attacks.
Nanite Surge (1 per long rest). An android’s body is infused with nanites. Once per day as a bonus action or a reaction, an android can cause its nanites to surge, granting a proficiency die bonus of +1d4 to any one d20; this ability must be activated before the roll is made. When a deformed android uses this power, it’s circuitry-tattoos glow with red light equivalent to that of a torch in illumination for 1 round.
Surprise Attack. If the deformed android surprises a creature and hits it with an attack during the first round of combat, the target takes an extra 7 (2d6) damage from the attack.
Multiattack. The deformed android makes two melee attacks.
Scrapmetal Morningstar. Melee Weapon Attack: +5 to hit, reach 5 ft., one target.
Hit: 14 (2d8 + 5) piercing damage.
Scrapmetal javelin. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 30/120 ft., one target.
Hit: 12 (2d6 + 5) piercing damage in melee or 6 (1d6 + 3) piercing damage at range.