It's a bit more complicated than that, and you can make decisions which can heavily penalize you. The person above who said that the optimal way to way would in

It's a bit more complicated than that, and you can make decisions which can heavily penalize you. The person above who said that the optimal way to way would involve spreadsheets is correct, but this one isn't. Ultimately you have (when I tried it a couple of years ago) two main resources, and three meta resources. Try to think of each of them as a graph of growth over time. Gold is roughly upstream of DPS, but There are additive, multiplicative, and even quadratic effects than may be applied to that relationship in the form of hero powers, items?, etc. However, since by design the relationship between hundreds of effects (mostly in the form of hero powers) isn't clear, some purchases are easily 100,000,000,000,000% better than others, which is to say one wastes your gold. It's more of a long term time based math puzzle than a game, but there is definitely an evolution of mechanics, as you put it. Also despite the name, I'm pretty sure you pretty much never click in it past the first 10 minutes.