can a standard mnemonic be used? and is there a standardized coin type/derivation path? (SLIP44?) 

 Yes, indeed. We're using a standardized path for Cashu.

https://void.cat/d/6YyhcwNAB77csu4c8gfzwF.webp
Source: https://github.com/cashubtc/nutshell/pull/131 

 Thanks Doc 👏 ecash is nuts