Hey, got a few questions

Tier 2 land factories cost more and cost something to upgrade tier 1 to tier 2. But I can build tier 2 units with tier 1 land factories...so what is the point in upgrading them if it s cheaper to just build tier 1 factories?

Also at some point during my skirmish..things start to take longer to build. I remember it being buildings and maybe units too. Is this a safe guard?

I built an army so big that eventually I couldn't build enough energy buildings . I built like 50 extra buildings to produce energy to get out of the negative. So I actually paused all production and my energy just never grew. Does it cost energy to simply have experimentals on the battlefield even though you already paid for them. That was the only conclusion I could come too as to why I wasn't getting anymore energy. I swear I had so many energy buildings..it didn't make sense where it was getting spent. All production was paused and no buildings were getting built at this point.

Thanks for any help!!!