Best Quantity Discount + Subscription App

[miraiclinical]

Our store (https://miraiclinical.com/) currently uses Bold Subscription app and SpurIT Quantity/Volume Discount App. We were informed they don't work well together and now we're looking for the best app that has these functions, ideally 1 app. We tried VITALS (40+ in one), but it didn't work for us. Any recommendations would be much appreciated!