Never spent ANYTHING, just spent all of it on 4 Credo Masters, 4 Gallant Knights, an Exalted Memorial, and my extra Rancor for the Pierce. Lets see how this goes....
I have now successfully killed all of you humans and am now the size of 200 of your puny skyscrapers. You seem to have organized a large militia made of small children. You have now killed me 8 times, and I think I shall be appeased by eating lizards now. *Goes back underground*
The reason the spikes are there is because they don't want the Fist of Goodness falling into their dinner parties. (http://www.youtube.com/watch?v=Lo2hyWYOV6g) <--- Fist of Goodness
If the Apprentice shows up at low levels and you have least 1 Ranged Student. Fight him from behind a puddle. I did and barely made it through a perfect first year. Level 30 Sorceress + Exca Grimoire = OP
I like gamedude's idea, like with many other games, they have the easy pay-n-go way, or they could make it harder. 1 shiny = 5k of each resource. so my fourth worker would cost 5m twigs, pebbles, putty, and goo. give this a [+] and get it next to gamedude's comment!