i have no CE except one "summer mistress". by using servant bonus i can get +2+3+2, to farm stone/iron/lumber on the mountains.
i plan to farm 3000 each first on mountain and clear out the shop then i would have about 5 "Summer mistress" which give +5 water +5 food. with +6 servant bonus. so in total about +11/+5 water and good. then i can switch to farming those on their individual node.(Forest/Beach)
Is the the best way?
I think it's better to go for the other nodes instead. I do Grasslands in storm difficulty with no CEs other than a friend support. I get +7 to stones there per run and I get a fair amount of overall stones compared to the mountains. just do the other nodes with the right servants and get a good friend support. should be faster than doing mountain.
If you can get more than +2 on drops (including using a friends support) then its better to farm them separately, If you can't then mountans is fine.
Actually, I believe Mountain is more AP efficient when farming all three materials. You get around ~120 combined drops of materials with 2-3 bonuses to each whereas to get 100+ individual materials from it's respective node you'd need 8-12 bonus for that particular drop.
