Take no Mech or Building Damage in a single battle (Repaired damage is still damage):
Camila Vera and her 'Evasion: Mech unaffected by Webbing and Smoke' ability is almost essential for this Squad. Place her in your Jet Mech so it does not get caught up in its own smoke unable to do another bombing run. This will be even more apparent when you have +Range and are smoking 2 tiles at a time.
The Rocket Mech can be moved next to a Vek and fire its rocket in the opposite direction, hitting nothing and dropping a smoke cloud on the Vek to prevent its attack.
The Pulse Mech's 'Shield Self' should be an early unlock. The shield will active whenever Push is used even if you don't push anything. It can then be used to block damage or sit indefinitely on a hole refreshing its shield each turn. 'Shield Ally' can also be used on buildings, protecting them in advance.
Prioritise upgrading +1 Damage on your Rocket and Jet over Smoke damage early on. The smoke from your jet will cancel out the Vek, but you will want to make sure your Rocket kills its target.
Aerial Bomb can be used to limit the movement of the Vek, as they will avoid moving into smoke.
The Rusting Hulks make it easy to deal with powerful enemies by simply negating their attacks, but smoke clouds last for the entire battle. Try not to spread smoke around carelessly, or you could run out of options later in the fight.