I went down into DC with about 150+ large hypos and bandages, about 400 W2C rounds for my sniper, adrenaline shots, and about 250+ batteries, and I used up about 80% of my hypos/bandages, all of my W2C, and all of my batteries for my night vision goggles.
The hell were you doing down there? There is no way you wasted that much resources without actually trying to waste them.
As a Sniper with backup pistol, energy shield, taser, cloaking device and night vision googles I went to DC with:
250 7.62 micro-shrapnel rounds for my Spearhead
250 9mm acid rounds for my Neo luger
100 W2C rounds for both
(I don't use regular rounds)
20 regular/advanced hypos and bandages
30 lithium cells
10 fusion cells
And I came back with:
262(!) micro-shrapnel rounds, there was enough plates, scraps and cases lying around to craft them so I ended up with more than I brought. I was using them against everything except for snails and industrial bots
211 acid rounds, crafted a lot of them as well.
64 7.62 W2C rounds (I was able to buy a lot of them from both Leo and Tchortists) and 92 9mm ones (didn't get much use of them).
(Never fired a single standard round)
8 regular hypos, 21(!) advanced hypos, 14 bandages, and 3 super hypos that I never used.
over 100(!) lithium cells, there was like 60 of them in the warehouse alone and a lot of them in the Arke power station and various containers
15(!) fusion cells
6 plasma cells, never used a single one
I feel like many people exaggerate how difficult Deep Caverns are, it's really not that hard and not even combat heavy if you do things right.
Mushroom Forest is trivial with a good low frequency energy shield (crafted one works best, but you can find a few of them in the warehouse as well) or once you get a Biohazard Suit (and you can find 3 of them in the whole Deep Caverns).
Tchortlings can be avoided completly even with 0 stealth, just use the hatches/Faceless territory/caves/that one room in the tchortists base to get rid of the debuff before it reaches 20 stacks. I killed 4 tchortlings total, the named one and 3 more because I wanted their odditites.
You don't need to fight Faceless at all if you managed to stay neutral/friendly to them, and if not- well it's on you.
Arke Power station requires some stealth to avoid combat, but the robots don't respawn very fast so it's fine either way.
Burrowers are easy.
Deep Worms can be avoided even with 0 stealth, just don't get near them.