What loadouts/equipment would be useful for...

I am planning a campaign on a desert world with normal earth gravity that is frequented by electrical and dust storms. The planet is equipped with a powerful defense >!(lost-tech from a terrifyingly advanced race)!< that necessitates ground combat and prohibits orbital bombardment.

Our heroes are at late TL9/early TL10. What would they need to survive and fight on a desert world with frequent storms? Any advice is great.

The invading techno barbarian xenos are at early TL 11, and make extensive use to cyborg troopers. They are a low gravity race and are sluggish in normal (1 earth G) gravity.

Any and all advice or discussion about what would be useful in terms of kit or tactics would be very useful. Thank you everyone in advance!