What if you have few resources? To build Cyclops and Behemoths, you need 30 crystals – not that much...
Guys, everything is beautifully described above, but finding 30 (or at least 10) crystals in the first week is not always realistic... besides, you need 20 wood for Ogres, a lot of stone for everyone else, and money, of course... all this implies extraordinary luck for the player - and with this
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I'll continue:-)
...with this luck, you can play as anyone - if you're lucky, you're lucky!
Rapid development does not imply the need to fully build up the castle.