Below is a link to a playlist with all Spartan Ops on Legendary - Solo - No Deaths.
Obviously you don't have to be this insane at Halo, but it'll show you how to get through each mission. Just pick whatever mission you need from the list:
https://www.youtube.com/playlist?list=PLlpMcU4Rd7FKRpoToHzah...Credit goes to YouTube User "RC Master"