Thanks for that, you explained how people get to Ellinia on day 5 really clearly. That's always confused me and I've finished the game 5 times.
Playing the game through without any tricks to save time, it seems to take at least 20 or so days to complete the game if you defeat everything.
The other thing is, when you say you are going to Demonis on day 3, you mean that you are dodging a hell of a lot of enemy stacks, right? I have gotten quite good at this too, and it is possible to get into Demonis, but there is a fair bit of reloading involved, especially if there is an enemy hero at the gate to Demonis in Underground Sea.