I didn't pass BEC last quarter, but I did have some pretty nasty sims that took a lot of time. I came out thinking I did awful on the Sims Although I didn't pass I got a 71 and actually ended up doing “stronger” on my score performance sheet on Sims. So if you think you did okay on the written and MCQ you should be fine. My WC were garbage last quarter because I spent too much time on SIMs.
As far as topics, the first quarter I saw a lot of a few topics, the second I saw more of the other topics I didn't see on my first. So honestly just be prepared for anything.