u/Character-Anxious

Does anyone have some advice on how I should be building trap tunnels correctly and funnel the husks into the tunnel instead of them taking a long route around? I usually put two tiles down side by side with walls and roofs. Then I put broadsides, wooden floor traps, and then either ceiling tire traps, gas traps, or electric field traps on the roof. I dont know if thats too much for a trap tunnel. I dont really make those special build edits since I have simple edit and that other edit setting active.

I was wondering if its worth getting the legendary schematics from the collection book for weapons that are interesting while im out and about doing main quests and such? As a new player should I be doing my best to buy as much of the materials in the weekly shop for upgrading things?

2. Should I worry about upgrading a weapons rarity at any given time or just simply focus on legendary schematics?

3. How do I know if im too OP for the zone im in? Like Im currently in Plankerton and the mission says 19 recommended. Is that perfect or is being 2 levels ahead already enough? My guns are maxed out lvl 20 with 2 stars for their tier.

4. Im pretty sure theres a meta, as I havent looked anything up about what the best guns are and why. Do I have to use meta or just about any gun can work in this game? Am I able to craft guns and get my resources back if I end up not liking the feel of a weapon or if it underperforms?