Snapcaster Mage and Glimpse the Unthinkable is a bit expansive for me
Ok fair enough. I know the feeling. Mtg is expensive
also do i need 4 balustrade spy, archaeomancer and archive trap?
I don't think their required but you'd wanna be sure to a
balance between creatures and spells in the deck. If you feel you can kill you oppenent fast enough without them then go ahead and remove them. You might want to reconsider
archaeomancer though as getting spells back could be useful, but thats up to you.
and is there any land card i should get or how much land do i need?
I have no idea try looking on gatherer you might find something you like. Thats what I do:p. As for the amount I personally never run more than 20 but then I usually have some form of ard that searches out land or provides mana ramp. I've only built 2 good decks myself so I'm by no means an expert at mtg.
Btw is this deck still avaliable to look at? The link doesn't seem to work for me.