I do like EZ's sewn bind off or the tubular bind off but I don't know how to change it for 4 x 2 rib. You can do the no flare
bind off for 4 x 2. It's essentially the same as binding off in pattern with a twist as you switch from knits to purls and vice versa.
Here's also a stretchability comparison
of several bind offs with links to the methods.