I won't say right or wrong, but we've never done it like that.
We start with just bar weight plus bands, and work up to the bar weight we intend to use that day as our "work set" with the bands, which is roughly 40% of the max squat under the same conditions (same amount of equipment). When we get to that 40% or so, we then use THAT weight at THAT bar tension for 8 x 2. Then we're done.
For example, I was using 225 plus average bands in Tulsa last weekend. So I started with the bands and just the bar. Then I did quarters, then plates, then another quarter, then 2 plates...when I got to 2 plates (225 plus the bands) I did 8 x 2 at that weight.
We use a 3-4 week rotation of band tension that's roughly 40%, 43%, 47%, 50%. Something along those lines, then start over.
Since the max effort work is based on the individual for the week, DE work can accomodate accordingly. Everything's fluid, that's why I like it.