I'v just unlocked high lands, is a cursed foundry level 1 better than a sub terrinean level 3? Or should i get CF to level2?
When you are converting to T4, never get rid of your lvl 3 T3 unless you have enough to upgrade to lvl 2 T4.
With the troop buildings, the cost for lvl 2 T4 is 11.25 billion. Subtract the 266 million you get from selling a lvl 3 T3 building, you need around 10.84 bil
Cursed Foundry level 2 would be a smarter choice because it brings in more plunder than a lvl 1 CF and a lvl 3 subterranean factory. The lvl 1 cursed foundry could caus a plunder decrease if you converted a lvl 3 subterranean factory into it.