Spikes are broken and help the team force progress along with knock off to knock off boots off of ho oh or a defensive eternatus. It’s the team’s check to threats like Ultra Necrozma, Pogre, Zyg c, and partially normal ekiller Arceus. Leech is pretty necessary on Ferro on any tier really so that’s self explanatory. Stall also apparently doesn’t like Ferro because of spikes + knock forcing progress and stall not having the ability to consistently threaten Ferro and its teammates. Tera ghost is an idea from ndou but I thought it was cool to help surprise and thus soft check stuff like deoa and marsh, making them much less threatening. Tera water is also an option but I’m interested in Tera ghost’s potential utility.
This thing is one of 2 (or I guess 3?) wincons. This thing is stupid fat and with Tera it can be really annoying to tons of structures that can’t threaten it effectively and like always glare is broken. Tera poison is for any Tspikes etern stuff out there which can be annoying to these builds while also koing it back in return among other stuff like zacian and can (I think?) setup on non taunt races fairy. Not only that, it provides a check to a multitude of threats in the metagame, including primal groudon, Marshadow, and Ho-Oh.
Mon is our rocker and our check to threats like yveltal, Arceus-dark, and mega salamence. I have a spdef inclined spread because I felt it was better on this build for checking yveltal better while also doing better against stuff like Etern (after Tera) and palkia-o because I heard that guy puts up numbers against balances. Besides that taunt is useful for denying rocks against pdon and defog from ho oh. I think it had another use but I forgot it, so another option like say willowisp is plausible. Tera water is replaceable for poison probably but it can help pivot around palko easier. Tbh the option is probably better with will-o but I think it’s fine since water is generally good as a defensive type.
Shoutouts to bumboclaat for suggesting this as a core with Ferro for me. This mon has seen an uptick in usage on these types of teams because of its ability to greatly pressure the main defoggers of the tier which is, obviously, great for a team that uses hazards for progress. Besides that salt cure is ALSO broken and forces chip damage against literally anything, being very annoying to Pokemon like Ferro, pdon, eterna, and ndm long term. It also checks a bunch of threats with Tera which can make it feel Tera reliant at times but it’s still good to potentially gain more chip or play around a certain threat like pdon and ndm. Not only that it’s a good wincon asw which can help it pilot around matchups it should not be winning with Tera, such as against sd pdon and groundceus granted it gets an id as they switch in. A physdef spread mainly helps take care of those guys with Tera along with other stuff like giratina-O (allowing the team to keep up hazards in the face of it) and Mega Salamence. Overall allows a lot of mus to be won easier because of scure and hazards being an insane combo.
Ho oh is interesting because it’s one of the few actually good defoggers in this tier. I felt it was necessary because I have no boots guys and stuff like Garg, ditto, and and zygc don’t like spikes especially. Although defensive ho oh is able to be overhelmed, stuff like Garg, Ferro, and zygc give it a stable core to fall back on so its load isn’t as high. As for what it checks for this team, it’s good into cm fairyceus with whirlwind and other stuff like zygc, groundceus, and zacian c; being a valuable ground immunity for the former 2. Tera dark is to do better into psyspam and potentially some kind of Bascu thing if Garg gets overwhelmed but a burn will save ur game.
This is our speed control and anti-ho resource. I think ditto is very fascinating and I feel it’s worth trying out due to many setup threats and ho being a good style in the meta I think. It’s good at revenging literally anything under the sun; meteor beam lunala, Zac-c, eternatus, and probably a bunch of other stuff I’m forgetting. Tera ghost is for being able to rkill espeed normalceus reliably, thus saving chip damage on Ferrothorn. Fat balances usually are able to be overwhelmed by ho in my experience with other tiers; I don’t know if that’s true here but I think it’s worth at least being insured for well.
…And that’s the team! Pls don’t flame too hard in the ndubers cord lol I tried my best. I think this tier being able to have a ton of balance options is very cool and I expect to build more in the future
Chien-Pao Balance
Zacian-C then being unable to do little else for a team of this sort led me to just have 
Arceus(-Dark) and 
Arceus. It's middling speed leaves it outsped by 
Marshadow's Shadow Sneak and 
Ultra Necrozma issue caused by not running 
Kyogre is scary.