I know it's a little late in the game, but Steel / Water is really bothering me now. Water-types don't really settle in the metagame as the pivot this concept calls for, where they pressure offensive switch-ins. The best Water-types have end up in mostly three groups:



1) Wallbreakers / sweepers like Volkraken, Greninja-Ash, or Naviathan



Volkraken and Greninja-Ash in particular have really high offensive stats and speed, as well as better moves to punish switch-ins like U-turn and Spikes, which might not be desirable traits on a Steel / Water pivot. Furthermore, Naviathan, another Steel / Water, doesn't even run Heavy Slam on its primary offensive set, favoring Icicle Crash or Slack Off first after Dragon Dance / Waterfall / Facade.



2) Bulky mono-attacking stallbreakers like Suicune or CM Naviathan.



Note that Suicune runs Substitute / Protect / Scald / Calm Mind. Sub + Protect are automatic additions to CAP26 due to all TM-learning Pokemon getting them, and Naviathan barely has room to run coverage, let alone Steel-type STAB, and if it drops any of Calm Mind / Taunt / Recover, it's not a good stallbreaker anymore.



3) Walls like Arghonaut and Toxapex.



While Toxapex can be classified as pivot, you'd be hard pressed not to classify both of these as walls first. In fact, Toxapex's Regenerator is probably the only reason why you can call it a pivot really, and their access to entry hazards allows them to punish switch-ins, which really only alleviates how passive they are.



Now, there are a few oddballs left like Krilowatt (offensive pivot with Electric / Ice / Ground coverage - it would be significantly worse without this coverage), Gyarados (Dragon Dance sweeper with Moxie), and Rotom-W (pivots with Volt Switch). Though, I'm not sure if we'll actually get a moveset like we'd want: Doom Desire / Water-type STAB / utility / utility/recovery. The Pokemon that want to run Water-type STAB effectively with their secondary STAB are fast sweepers/wallbreakers, and in the case of Naviathan, it doesn't even run its secondary STAB. Doom Desire doesn't lend itself to be a stallbreaker; moves like Calm Mind + Pressure Stalling or Calm Mind + Taunt do. Finally, Doom Desire is less efficient at forcing damage on an opponent like Toxapex's Toxic Spikes or Arghonaut's Spikes are, so Doom Desire doesn't lend itself as a wall either.



So, I'm not sure where the Steel / Water CAP26 really shakes out in this. Being a fast sweeper invalidates the idea of being a pivot, and being a stallbreaker means that Doom Desire doesn't have a place on its set. Are we really capable of finding way where a Water-type can be an offensive pivot when there aren't really many examples of them? Or a defensive pivot isn't an even more passive wall than Toxapex or Arghonaut? Remember that Doom Desire should be at the forefront of CAP26's sets, so polarizing utility like pivoting moves and excessive use of other utility moves aren't real options here. The way that the metagame treats Water-types hasn't really shown this to be easy, if possible at all, despite how many Water-types we have (a lot of which that I haven't even mentioned are at the bottom of the VR).



Furthermore, adding Water to Steel typing doesn't exactly help its resist chart. Being neutral to Fire-type moves doesn't really alleviate its matchup with powerful Fire-type nukes, a point I made with Steel / Dragon earlier this thread, while resisting Water-type moves really only helps against Dragon Dance Naviathan (a rather rare sweeper, only appearing on some screens teams), and Ash Greninja's Dark Pulse and Volkraken's Fire-type STAB can bypass the Water-type resistance, so adding a Fire-type and a Water-type resistance didn't really provide much, but then you're looking at Kartana, Jumbao, and Necturna's Grass-type STAB moves being neutral now and Tapu Koko and Krilowatt forcing CAP26 out. In other words, in this metagame, Steel / Water is actually not that great of a defensive typing because the resists it does provide don't really outweigh the additional weaknesses it provides.