The 2 for 1 Tuesdays are now on Uber Eats as well, which is a signficantly better deal for delivery then dominos.co.nz for small orders, and it is still delivered by Domino's staff. Unfortunately this cannot stack with any of the other Uber Eats deals. No delivery or service fees apply. Valid pizzas start from $18.60 (for two delivered).
On Traditional Pizzas (not Deluxe), the upgrade to Extra Large is free (thanks quote!). With this, two XL pizzas can be deliverd from $18.60.