As I stated to Sreeya maiming as disarmament are alternatives to killing the opponent. Killing them is accepted and not frowned upon by any means, in Audroti's eyes if they died in battle they were weak and unworthy of being a Sith anyways. However, if they survive the desert is their test to regain their right to be on the path to becoming a Sith. You failed to defeat am opponent but you defeated Korriban. Now I am not CHANGING the rules but that is an alternative you can discuss amongst yourselves, and the desert isn't certain death.