Marc Fisher's headline offer right now is an extra 30% off your entire order, which works on top of existing sale prices and is the best choice for most shoppers. However, with so many concurrent promotions running, your best deal depends entirely on what you're buying and where you're shopping within the site.
On full price items: The 15% off your order deal offers a straightforward discount if you're buying from the main collection at regular prices. If you're shopping new styles, you can do better with the up to 60% off new styles promotion instead.
On sale and clearance items: This is where things get interesting, since multiple discounts layer on top of sale prices. The extra 30% off sale styles (available as both a standard offer and specifically for heeled sandals) will beat the 15% option on clearance buys. The up to 75% off sale styles promotion is your absolute best offer if the item you want qualifies, though not every sale piece will hit that maximum discount. For most mid-season sale items without that top tier markdown, the extra 30% off your order or the extra 30% off sale styles will save you the most.
On category specific buys: If you're after sandals, the dedicated up to 50% off sandals deal applies only to that category. If you're looking at the Lynzi woven leather mule specifically, you'll get up to 15% off that style alone. These category offers are usually narrower than the sitewide promotions, so check whether the broader 30% off or the up to 75% off sale styles apply to your item instead.
On new arrivals: New styles added to the sale are covered by the up to 60% off new styles promotion, which typically beats the 15% general offer for these pieces.
On the Friends & Family sale: This 25% off sitewide deal sits between the 15% general discount and the 30% off offers, so it's only worth using if the other two aren't available during your shopping window.
Only one offer applies at checkout, so compare your basket total under each eligible promotion before you buy. Whichever percentage produces the larger final saving is the one to choose.