The up to 60% off selected products sale at the top of the page is the main offer and suits shoppers hunting marked down tableware, glassware and gifts; there are no coupon codes on this page, only site deals.
If you are buying a mix of sale items or looking for the biggest markdowns, start with the up to 60% off selected products, since those discounts are already shown in the price and can be the lowest price on many individual pieces.
If this is your first order and you have mostly full price items, the 15% off first order for newsletter signups can beat smaller sitewide sale percentages on regular priced items, as long as the products you choose are eligible for the signup discount (first order only).
If you want a single higher priced collection item, check the Pacific collection under $380 entry; it gives you a clear cap on spending for that range so you can compare it directly with sale prices rather than hunting for separate reductions across ranges.
If delivery cost matters because you have a heavier or multi item cart, aim for free shipping: either free shipping on orders over $200 or free ground shipping on orders over $199 will remove delivery fees on larger baskets, making a higher spend on sale items more attractive.