Activate "Scapegoat", then equip "Masked Chopper" with "United We Stand" to boost its ATK by 4000, making it have enough ATK to destroy most monsters, ensuring you to cause Effect Damage due to "Masked Chopper's" effect. If any of the Sheep Tokens is destroyed, you can always replace them with your other monsters. Swarming Decks would be the best to use with this tactic, as they can get monsters to the field quickly, and therefore, allowing "Masked Chopper" to maintain its high ATK due to "United We Stand".
When attacking a monster in defense mode with "Masked Chopper", use "Micro Ray" to reduce its DEF to 0, allowing you to destroy it more easily.
Since "Masked Chopper" is a Level 1 monster, you can use "Double Attack" to discard a Level 2 or higher monster from your hand to the Graveyard to allow it to attack twice during the same turn, with enough cards to strengthen its ATK against your opponent's monster(s), and inflict 4000 damage to your opponent.
Combo this card with "Moon Mirror Shield" to ensure that it will always have atleast 100 ATK over any monster it battles.