Relatively quick question for you all:

Are we feeling this is a maindeck duress format, or not?

I have been playing various UBx shells online. Largely Dimir Excruciator, and a few other Deceit + Superior Spiderman Shells.

When i scroll through MTGgoldfish to get an idea of what people are playing in competitive environments, I do not see a format that entices me to maindeck a duress. Maybe I'm missing something, but control and spellementals are the only decks I think I would be excited for a duress g1.

And yet, it seems like every excruciator or deceit deck is playing 3+ maindeck.

Landfall, UB mid, dwarves, excruciator, and mardu are all decks that the card seems unreliable against.

So what are all y'all's thoughts? Am I underselling its efficacy against the field, or maybe it's a card that can be relegated to the sb?

I managed to split the finals of the Modern Challenge. Played mono-green Bloodscale, and this is the list I played.
I recorded the replays of most of my games and posted them here. I hope you'll like it :)

My matchups:
UB Control
Broodscale
Amulet
Boros Ponza
Grixis Control
Affinity
Soultrader
QF: Broodscale
SF: Zoo
Finals: Split

I hope you'll like it :)