Ok. There is some comfusion. Per the rules a spell pyramid doesn't have to be wider then 4 slots unless you want more.
At this time I have a :
1/6,2/5,3/4,4/3,5/2,5/1
Now the question is. can i buy 4,5,6 or would i have to buy 3,4,5.
I hope that helps fix things.