This slate has all sorts of cool suggestions
King Shield Slowking- This suggestion caught my eye as its kinda like how i thought about Defiant Entei: it buffed both the pokemon and the ability (or move in this case). In terms of King Shield, this move vanished after aegi got banned, but slowking being a specially oriented can take advantage of the attack drop granted from king shield. The only problem is that its kinda reliant on the opposing pokemon being at -2 to take a physical attack well, Plus bisharp always forces it out cause of defiant. I was never a fan of King Shield cause aegi was already bulky on both defensive spectrums, and its typing just was godly as hell. Pretty sure this guy completly counters Mega Metagross, so thats something i like about it.
Heal Bell Bronzong- Yea it can heal status now, but its still outclassed as a cleric by clefable and sylveon who can also pass wishes. It gets rocks, but Clefable can do that to. This one just doesn't shine for me.
Dark/Fairy Absol- This guys is fighting for my vote with Slowking. Fairy typing brings a steel, Poison and it keeps its fairy weakness, but absol should never be taking hits anyway so its not that bad, but instead looses its weakness to Fighting and bug moves, so its no longer as threatened by mach punches and U-Turns. It also gains a quad resistance to dark moves, so this thing is not threatened by dark types at all, and a dragon immunities which is the greatest asset. It now resists both of the Latis STABS and threatens it back with STAB Knock Off/Play Rough. Also, Dark/Fairy is also very good neutral coverage, leaving it able to run Sucker Punch, (Parting Shot if it doesn't conflict with the theorymon slate), Megahorn, Zen Headbutt, Stone Edge, Fire Blast and Ice Beam. This guy really shines but slowking does to, i just can't decide.
Agility Dragalge- This thing reminds me of Mega Ampharos, except that extra speed point that is lost does hurt it. Ampharos hit a sexy 378 with Modest, which outsped Greninja, the fastest non scarfed threat in the tier, Dragalge only hits 374 with modest, which leaves it outsped by Mega Pidgeot and Tornadus-Therian, which i think are the fastest non scarfed pokemon in the Post Greninja meta. You can run Jolly, but you already loose a lot of power from not being able to drop draco meteors due to it being counter intuitive to sweeping. I do see the merits of using this set and how its sorta like Mega Ampharos. Both have very Unique Defenisve and Offensive typings that help them set up an Agility, but they both have their niches. Ampharos has much better bulk than Dragalge, but Dragalge gets a bit more power with Adaptability boosting its great neutral stab coverage, as well as being able to hold an item to further boost its attack, while Ampharos is forced to hold its Mega stone. Ampharos does still boast a whopping 165 SpA stat, which means that its coverage moves still hit as hard, while Dragalge only having a 97 base SpA, meaning his coverage moves won't be hitting as hard as its stabs, so Bulky Steel Types do hinder a sweep a bit more for Dragalge than Ampharos, although i hate saying it, Ampharos does use your mega slot so it does have opportunity cost. Overall id say they both have merits and if you don't have a mega, Dragalge can fulfill Ampharos roll as an agility sweeper pretty well.