1: Omega, because there's bloodwood in treehouse east of biodome
2: Bloodwood, try guessing how I get it
3: I don't in early game, but I probably would use my mid game strat: scavenged dawn totems
4: Whatever I scavenge first, so probably berries
5: Tinker goggles, you can put NV and node vision on them
BTW, always pick longsword as your melee weapon, it's lunge ability and some practice can get you in/out/over places