Farewell is possibly the best boardwipe in the whole of commander, with its versatility and ability to exile (not destroy, importantly) whatever you need at that moment while protecting the other types you want to keep around
You remove a threat, sure, but you also see their entire plan
Effects modifying power and toughness, effects from counters, and finally, effects switching power and toughness are applied after the effect of Tarmogoyfs CDA, and are applied to the values granted by it
Choose which deck you want the Dueling Robot to use and press Duel
While you do not have to replace all of these, these are the best options for cuts for some of the following cards
equip this card to it as an Equip Spell that gives it 1000 ATK, then you can return cards from the field to the hand, up to the number of materials this card had