Dunno from warrior perspective, but i must admit for a rogue it's not so hard.
When I've read about ark during testing phase i've almost shit my armour. Didn't went there until lvl 21, with over a hundred mino potions, but right now i have two storages of ark stuff, cleared main and reactor area multiple times and with a bit of strategical planning i can fully heal myself using baterries only plus some medkits in reactor level and still some extra stays in backpack after every run.
I died like 2-3 times maybe but only because of a game freeze and David admiration to robo post mortem explosions.
Ive used like 15% of the resources prepared just to figure the stuff up. Once you have it, the ark will feed you without any external resources for lvl 20+ char. I still haven't confronted horror because i simply didn't wanted to. Just for you to know it's not the end of the word there, dont grind too much because it might not be required. Just give it a try. some useful stuff can be found on the main floor boxes as well, got automated gloves from the box after first barrier and helmet from s/e corrner widely available. It gets easier with every peace of junk you'll find there.
From my side i can recommend to put tiara of heaven, half moon medalion and just adamantium sword unless warriors has some better weapon. For a rogue i find it the best and sufficient.