For Mech (Vehicular) combat, I would propose using a modified form of the Abstract Aerospace Combat Rules from Strategic Operations (p.21):
Each Mech (or Aerospace Fighter or Tank) makes an (Average) Piloting roll
If both pilots succeed, the winner (highest total) picks the range (Close/Short/Medium/Long). Ties go to highest MoS. If there is still a tie, the range is
Medium.
If one pilot succeeds and the other fails, the Winning pilot attacks from the Rear.
If both pilots fail, the range is Long
Otherwise combat is the same in Mechwarrior Destiny.
What do you guys think?
