Cacturne still faces the same problems it had in ORAS being that it had poor match up against a lot of things and in most situations, 90% of the tier are able to beat Cacturne 1 v 1 regardless of typing match ups since it's pretty slow and frail with numerous weaknesses. It also doesn't help that Sucker Punch had a slight nerf making things even worse. I think the second set you posted seems pretty mediocre since Sucker Punch is your only dark stab, making for an easy switch and NU is riddled with 100's of grass resists for Seed Bomb. I guess Destiny Bond could drag something else down, but I don't think Cacturne has enough merits to justify using it on a team.
I still think Abomasnow would want to use life orb as it would prefer to switch between moves which would make it easier for breaking down defensive cores. Ice Shard utility is too good to miss out on and Earthquake OHKO's practically every fire type after stealth rocks without having to worry about Focus Blast accuracy or HP rock since it's not strong enough.
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Anyway in my last post, I talked about Necrozma and how I wanted it banned but now I want to talk about angry dino too, pushing for a ban of both of them still.
I think it's too overwhelming and there's practically no reliable defensive answers to Tyrantrum, Head Smash obliterates everything that doesn't resist rock while it's high powered coverage moves handles almost everything else. It's typing gives it some decent utility defensively thanks to Electric, Flying, Normal and Poison resistances however that x4 resistance to fire really helps as you can easily take advantage of choice locked mons such as Emboar, Delphox, Typhlosion and others setting up a Dragon Dance or just going for an attack. 82 / 119 defense gives it huge physical bulk for an offensive Pokemon which eases up for other set up opportunities or potential switch ins.
Personally I think Dragon Dance 3 attacks is the best set. With a jolly nature and one boost, it's able to outspeed the unboosted tier except for Accelgor (Electrode and Ninjask aren't too relevant) at that stage, if Steelix tried to switch in, it fails to be a reliable answer as it fails to OHKO and may get 2HKO'd itself with 2 boosted Earthquakes. I've even seen lot of people on the ladder or in room tournaments use Groundium Z and with just a little chip damage, it can OHKO. If Steelix or any rock resist aren't your biggest problem, Dragonium Z is also a good idea not locking you into Outrage and hitting extremely hard. Tagging
PursuitOfHappiny because I know he's had a lot of success with Dragonium Z set. Rhydon is probably a slightly better response but keeping it healthy throughout the match can be a little difficult since it has no recovery and it hates taking damage from repeated Earthquakes.
136+ Atk Steelix Earthquake vs. 0 HP / 0 Def Tyrantrum: 206-246 (67.5 - 80.6%) -- guaranteed 2HKO
+1 252 Atk Tyrantrum Earthquake vs. 244 HP / 0 Def Steelix: 170-200 (48.2 - 56.8%) -- 41% chance to 2HKO after Leftovers recovery
+1 252 Atk Tyrantrum Tectonic Rage (180 BP) vs. 244 HP / 0 Def Steelix: 304-358 (86.3 - 101.7%) -- 12.5% chance to OHKO
Choice Scarf on the other hand makes for a great revenge killer while still being able to threaten defensive and balanced teams and Choice Band hits extremely hard right off the bat.
tl dr; too strong, ban necro & ttrum.