For 4.0, i used David Thaddeus's videos. THEY ARE INCREDIBLY HELPFUL. It is super important to know the concepts behind the math. I had to cram because life and work are things we have to deal with. I spent about 6 weeks studying.
For the vignette, i finished it in 12 mins. i have been using Architect Exam Prep videos since day 1 and have never failed a vignette. They have different scenarios so you can handle whatever is thrown at you.
I found Ballast and Kaplan helpful as quick resources when i needed to look things up, but the major framework for studying came from Thaddeus.
Good luck All.