Desert tier 3 build recommendation

Desert tier 3 just seems impossible to me. I've tried multiple builds, keep dying to the final boss stage. I had fluked the forest tier 3 on my very first run with calcium, so desert tier 3 is biting my ass in return. Personally I think Bandit is a good choice as Dexecutioner is a great weapon and having it as the primary helps in the final stage, but feel free to recommend anyone that works.