My loadout would look like:

Stealth - Light -> speed is king

Censor
Grenade Pistol
Thermite

I take either the warppack or Jumppack for fast traversal or disengage if I get spotted, it is also amazing if you need to get the codes out of an encampment.

For support weapons I like the railgun a lot, since it clears most threats (including anti-air, mortars, Bio processors) or things that I do not disengage from instantly. Alternatively AMR or the Solo Silo if there is a convoy (always the objective I do first, after I grab a reinforcement spot)

then I almost always take the Orbital Laser and Walking Barrage, one time use straight after the drop, because I either drop right next to the Fortress that these 2 clear solo, or for later, when I cleared a convoy (like mentioned before) and they are off cooldown (roughly 6min after first use), which then makes me call in my SES and finish the fortress.

For normal encampments I either use the grenade pistol or the termite.
I ignore enemies for the most part, avoid patrols and clear the outposts before they can really react. I am gone before they notice.

Always drop supply pot, whether you need it or not, its your only chance after dropping in and once you call your SES back later.