There is an improved way to do this now! This is an app, But only for The discounts in backend. Doesn’t affect your online store theme at all. It uses The new Shopify functions. We were trying to solve this for ourself with multiple different Members prices. The only One we found that handles it exactly as wanted is Discount Hub Unique Discounts
The only thing that was missing for us was fixed amount on The «specific collection and customer tag discount» I sent an Mail to The developer and he worked extra hours to implement it The same evening!
Now we set it up this way:
-a product metafield «discount amount for Members»
- then an automatic collections with condition: metafield is exactly 5, 10, 15. (1 collection per amount)
-then we create automatic discounts in The app with collection: «Members discount - $10» and set fixed amount to $10 discount
-now we only have to Edit The value in The product metafields to manage The Members pricing.
you can also do this easily with percentage, instead of fixed amount if you prefer that.