To remove excess delta I will go out to options that have around 45 days to expiration and use OTM options to achieve that. I like using options that have delta between 15-8 because options that are closer to ATM (40-30 delta) don’t have as much gamma and don’t lift the curve as much as I’d like on the upside, and options that are very far OTM (less than 5 delta) don’t gain as much value as the pricing model suggests and therefore don’t cover the cost of a roll.