Also, for the Elves, just like for the Demons, the upgraded creatures are much stronger than the regular ones, so we upgrade Fairies to Dryads at the very beginning, and we turn Ballerinas into Wind Dancers because they are at least somewhat useful, even more than that – they are a pretty good unit. And if we also use tactics, we will be able to defeat archers without any problems.
Yes, towards the end, we upgrade Dryads to Nymphs.
Upgrading Flies and Dancers early on deprives you of wood... which is a problem... Unless, of course, there are unprotected groups of enemies, then yes... But otherwise... In my opinion, it's better to upgrade archers.
