marilli
With you
Well, even if you try to counter ALL the threats, it's something kind of hard to do.... I guess not really hard, but you will be weak to a relatively underused threat, let it be Special 3 attacks + Taunt Samurott or Mixed Absol or something (of course, on a sliding scale of viability and gimmickiness) I find that Toxic spikes are still the soul of NU stall as it's something really really helpful in limiting your loss to 1 or at worst 2 mons (hopefully not something you still need) if you happen to run into a set you have only 1 shaky counter to because you were too busy countering Jynx, Magmortar, and Ludicolo.From my experience so far I think stall in NU can be more successful if you forget synergy altogether and just concentrate on finding a hard counter to the most powerful Pokemon in the tier. If you have something to always be able to take on Jynx, Magmortar, Absol etc then your team will likely be pretty solid and do decently on the ladder. Thinking in terms of 'counters' instead of walls also allows you to use stuff like RestTalkDDShelgon which is an amazingly elegant set and gives your 'stall' team much needed offensive threat. Having a reliable win condition like Perish Song Altaria also helps massively against stuff like Duosion. Altaria also counters Magmortar pretty well (you just have to double switch to check for HP Ice) so that's another 'counter' and another member of the team.
If a stall team is built this way then hazards aren't necessarily even needed because you try to play with a team full of hard counters that beats the most powerful threats anyway. Not that you don't carry any hazards but if it's not a requirement for defeating the top threats then that eases pressure on you having to set up and give away free turns. In a way it's kind of an offensive stall lol but I've played against teams like this and been thinking about the different ways to use stall and it gives me plenty of hope for this playstyle in NU.
Also, I thought that it's kind of obvious that pure typing 'synergy' in terms of resisting all offensive types don't really matter that much? There will still be mons that can hit you with exceptional coverage, so stall is naturally geared to countering the threats, not the type. Kinda like how all normal types will probably hit you neutrally at worst, so you can cover it with Tangela or something, without necessarily requiring a rock-type.
I have a semi-decent stall team coming up... hopefully it's good enough to share with you all!