I can pull more weight with sumo than my conventional, but sumo beats up my hips. Semi-sumo still lets me pull more weight, but without the associated hip pain.
I’m assuming your goals are powerlifting oriented (pulling the most weight possible) since you posted in the PL sub-forum, so as long as you can safely pull in a particular stance I see no real issue with any preferred variation.
I just started pulling “full sumo” a couple months ago. I started squat stance but had to move my feet out wider because I didn’t have enough room for my arms. On heavy pulls I helicoptered with a mixed grip and also scraped the crap out of my thighs with my fingers. A wider foot position fixed that but I’m definitely not as wide as some guys I see.
I think how much you’re deadlifting will tell you a bit more. Plateaus happen. They aren’t usually a reason to change technique; they’re often a reason to work on weaknesses instead. Video would help too.
I thought it was some sort of deadlift-focused breeding program. I don’t see the need for any fancy terms because that just confuses things, what you are talking about is simply a sumo deadlift with a not-so-wide stance. There is no right or wrong stance, only what works best for you. A lot of people lack flexibility and adductor strength when they first start pulling sumo so a closer stance works better at first but they can gradually move their feet out, however wider isn’t necessarily better.
To make a long story short, try different stances and see what works best if you think that conventional isn’t working for you. But if you issue is a plateau then adjusting technique and programming should be all you need to get things moving again.
I pull conventional in competition because it’s where I am strongest, but I use them all. Just as you would do wide grip or close grip bench do wide stance and close stance stance deads. Can’t hurt to be strong in multiple positions.
I train my conventional and use the rest as assistance. I did squat stance deadlifts after my squat for my 5x10’s with 5/3/1 BBB. It hurt.
This has happened to me. All I did was to give all heavy deadlifts a break and to focus on posterior chain hypertrophy for a few weeks. After that I eased back into heavy deadlifts. Seemed to do the trick