You might notice that on some planets it actually gets more difficult when you complete all the operations. But, there's also the RNG factor in which the AI just decides you aren't gonna win. There are few teams or fleets that don't have some small percentage of that.
For the clone mission, it's a special mission. Expect that sometimes you'll have a catastrophic failure due to RNG. For the Jedi Cal mission, I take in GK KAM JKR and Jolee. Because, if there's an issue, Jolee can revive. So give it a shot for the future as it'll help with the potential failure.