Where do high level (inferno) players use diamonds?

[Sebinsky2014]

(08-10-2015, 08:32 PM)Galroth Wrote: A)
Account bonus was maxed a long time ago.

B) Card drop bonus is a must for me. Farming cards is what we do.

C) Buy AP, to get those extremely expensive damage/speed upgrades.

A and B are the best because you get a lot of diamonds when you got 2 or 3 expeditions per 20h or what ever you choose at diamonds expeditions.