I wanna know how do you make units stronger/tougher. Like the unit can withstand bombs without loosing limbs such as the arms and head. Im kinda new to Cortex Command so can you please help me.

you could increase GibImpulseLimit and GibWoundLimit on each limb and the main body, that would make it be able to be shot up without gibbing.

Don't forget material, wounds, and JointStrength.

You can search to find anything ever asked in the past. Also, ImpulseDamageThreshold determines the velocity needed to take damage from a fall.

Thank You. I really appreciate the help.

Apart from the WoundGibLimit GibImpulseLimit and those you can change the StructuralIntegrity of the actor. For example, when I was testing a unit, I set it's structural integrity to 250 and when it got shot by a dummy dreagnought the bullets bounced off of him. It also made him fire proof, could resist frag grenades quite easily and minor firepower was ineffective on it.

Changing materials is generally a fairly extreme way of changing strength; making your actor invunerable doesn't generally make for an interesting mod, though if this is your aim it is generally easier to set the material to test and remove the lines regarding wounds.