Skimish mode.
OPFOR: 1x CP-10-Z
Lance: 4x Panther
Bully the mech until it's dead. Sprint right up to the OpFor mech so you don't get damaged by the CP-10-Z's LRMs and long range ACs. You can use JumpJets to basically get the same evasion, but also being able to use weapons.
Use PPCs to disrupt sensors so it can't get good hits on you and your evasion.
I managed to get this by destroying both the mech's legs, it doesn't require a CT or head to kill.