Zap splits work with Nostr Wallet Connect but they are quite annoying if the user is using regular wallet calls. Without NWC, users must go back and forth between the Amethyst and the wallet app for each split. It's quite annoying. 

We need a new method to pay multiple invoices in a single call. Lightning devs, help us out here. 

https://github.com/lightning/bolts/issues/1111