What are you liking? My head is swimming with ideas but I never have time to test, so I'm doing it vicariously through you haha.
I tried this deck in our monthly tourney last week it went 2-1 mainly against mono Jedi, (it's loss actually came against non mono Jedi )
-2x Killing Cold
I really dislike Mara's set and would gladly replace it with something that has a resource and shielding and some form of agro but haven't found what I'm looking for yet. The deck worked pretty well, 4 twists can really dampen a Jedi's day. I only lived the dream with Stele piloting the executor once but it was fun when he did. Against one of the mono Jedi set-ups I played an ice tromper turn 1-4 to push his main out. The deck works surprisingly well against vehicles as well with a lot of unit damage, it can have a bit of trouble holding the force so it may be worthwhile to swap mara out for sariss in that regard.
The other deck I've been putzing with its @@ Stele
-2x Unstoppable Advance
-2x Endor Gambit
-2x Mauler Mithel
It may make more sense to swap Endor Gambit out for Defense protocol or Kuat but this is what I've tested.
Both the walkers in Advance and Gambit provide good defenders against Jedi mains especially if you get them enhanced with Stele. Counsel just provides godly card draw and twsits and mauler provides a way to recur a limited amount of cards but also some tricks of his own with delta one shielding multiple engagements. The executor deck had slighly better results but this one still fairs pretty well. It's a bit resource light and could definitely use a Motti or Kuat boost. Between Endor Gambit and Counsel you get a nice card advantage (the AT-ST's replacing themselves in hand and draw from counsel.)
I'd be tempted to drop the Hoth @@'s and Mauler for a Defense Protocol and Baron Fel. You then end up losing out on your shielding bu providing quite a big defensive edge boost and bringing your cost curve into manageable ranges. Stele can still be really destructive on a Tie Attack Squadron or a Endor Gambit AT-ST and not ideal but Stele will contribute three force icons on your 181st ties. This may give you a better way to control the force AND attack/defend. So my next deck redo/tweak will be
-Counsel of the Sith