This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You can take architect level exam without having any prerequisites even SCJP. So you don't need to take SCBCD. If you feel that you are comfortable for architect level exam, you can directly go for it. But remember that exam is designed for those who have good *experiences* in JavaEE.