Interesting question. I’ve never met anybody in need of iron.
I craft a lot of tornadoes & usually get my lot for 1 month from AR. However, running short this time (have around 15-18 tornadoes left).
With TU (S4) on & AR still 3 days away, thought of farming the best stage in S4 for crude iron 
2 Likes
You are the second person today farming for CI.
My usual go to : P10-7N, is a no go for CI. Noted loot for 20 runs.
Farmed P2-8N 14x so far for backpacks:
CI : 7 runs (50%), total 11x. One run had 3x.
BP: 9 runs (64%), total 20x. One run had 5x.
Heimdall recommends P1-10H. You can try that, if you haven’t tried yet.
3 Likes
Hi @BrainyRation90 thanks for the tag I saw in an earlier thread for s4 13-3 hard is a good place for crude iron, I just tested it and got some.
I was thinking about omnia harvesters too but sadly they don’t work during the special (reduced cost) events.
1 Like
What @Cheds said… The AL will help bring in a steady supply of CI. Sorry @BrainyRation90, I don’t farm S4 so I can’t offer any useful farming advice, but AR is coming up real soon 
.
2 Likes
I use S4 event to farm some XP only. 
1 Like
farming backpacks on 2-9N…
1 Like
Thanks, @BlackZed & @StroopwafelJack . Will try S4-10-7N & S4-13-3H 
2 Likes
Hi @Shades
This may help - Recruits - all time & during seasons
1 Like