Hmmm Martians?
Not difficult to tackle.
The Future Combat book features 3 army lists at different tech levels.
The Martians would be well covered by the High Tech list.
Basic Combat Element is the Multirole Combat Suit (MCS). The MSC entry provides agood starting Point for a Martian unit.
The unit Looks like this:
Multirole Combat Suit Infantry Squad - 335 points
Multirole Combat Suit (MCS) Infantry provide the backbone of the High Tech Infantry. Their power armoured suits allow faster movement in difficult terrain while providing highly advanced protection and battlefield awareness.
1st MCS Fire Team: MCS Squad Leader (unit leader) with Laser Carbine, 4 MCS Soldiers with Laser Rifles.
2nd MCS Fire Team: MCS Team Leader with Laser Carbine, 4 MCS Soldiers with Laser Rifles.
Type Critical Hit Save Ld Ability
MCS Squad Leader,
MCS Team Leader 6+ 4+ 4+ 5 Fire Team, Grenades, Light Footed,
Night Vision, Tank Hunter
MCS Soldier 6+ 4+ 4+ 4 Fire Team, Grenades, Light Footed,
Night Vision, Tank Hunter
Weapon U/T Range Damage Features Points
Laser Carbine 3 12” 3xD6 Laser 6
Laser Rifle 3 24” D6+1 Laser 6
Laser
Laser or similar Beam weapons can inflict additional damage once they hit the target.
After all shooting attacks are resolved count the number of unsaved hits of the target unit. Roll for armour Save for that number again ignoring any cover modifiers or Infantry Cover saves. Which models to remove is again the choice of the model owning player.
So without any Options you have a power armoured unit (2+ save in Hard cover!) with a very decent ranged weapon.
But that is only where the fun starts.
The Options enable you then to fully stat your Units in almost any way desired...
Youn can add Artillery Specialist or Medics. You can equip the unit with Special weapons as an Anti Aircraft Guided Missile Launcher, Anti Tank Guided Missile Launcher, Flamethrower, Guided Grenade Launcher, Laser Assault Weapon, Kinetic Pulse Gun or Light Plasma Launcher ... and BTW all weapons have Points costs, so no guessing around.
Or you can give the unit a different combat role:
Close Combat Specialist, Cavalry, Motor or Hoverbikes, Combat Drugs , Jet Packs, Stealth Package etc etc