Extreme Farming question

[Belenger]

Long time lurker here, got one simple question on the first Extreme Quest 極限訓練：凍土と機甲 or Tundra/Machine one, has anyone found which floors render the most ammount of 1st and 2nd tier stones?

[Meji]

I believe floors 31-35 are the best for "farming", but I haven't tried it out myself.

[Rien]

Yeah, apparently 31-35 has the most number of rare floor chances so if you get those floors you get the mid tier stone

[Belenger]

Thanks for answering i'll try it soon.

[BlankM]

Still would like to know which floors drop the magica set. ;_;