Envoys are cool, but which card in particular? The +2 envoy pt card one? That's 1 more envoy every 50 turns; I'll probably be in another government by then. I don't even take it when i do get a green slot. The first = 2 one? That doesn't need a dedicated slot for it at all. You just put it in as needed. I think I'll try building it under Classical Republic and then switching to Autocracy. I used to do that with Oligarchy because it is useless outside of war (and honestly now, useless if you don't have iron/UU) unless you want to go full meme with spears.