Has anyone here used the ultra wide sumo deadlifts or the stiff leg sumo deadlifts mentioned in a Westside deadlift article from about a year ago? Do you use them as a max effort exercise or are they added in to a normal deadlift day like an assistance exercise.

I follow a Russian template and am deadlifting 2x weekly now and making solid progress on the speed (weights are still pretty light). The last time I implemented some tips from this article my deadlift shot up so I'm looking for any and all pointers in preparation for the NOTLD deadlift meet.