Hello, it is my belief that routes primarily focused on Dragon Dance are dangerous (read, more likely to fail).
I'll make the following claims:
1) Bypassing Argh is necessary for any "one and done" sweeper in CAP to reach viability.
2) Having midgame utility is the easiest route to viability for a sweeper in CAP (read priority, speed, or useful resists).
Notes:
Most of the packages I've seen that focus on a Dragon Dance set can satisfy 1), but fail on 2) as they lack priority, and largely focus on preserving Rock Head. Some examples of these include Pip's, BasedWhat's, and Tommaniacal's. My worry here really is that they don't offer the midgame utiltiy to really get a place on a team; just look at Dragonite which has exemplary stats, a wide movepool, but because it can't guarantee midgame utility (in CAP, it can in OU because it doesn't have to worry about Argh), it sees little CAP usage. There are some packages that manage to sidestep this by including powerful utility moves such as Sleep Powder (DLC's).
- By "one and done" I mean a dedicated sweeper that isn't leveraging its typing for midgame utility (see Garchomp/Roost Dnite in OU not CAP), and doesn't have strong priority (see Weavile).
- It is difficult for us to leverage our typing midgame by virtue of Zeraora / Clefable, two mons we'd like to take on, commonly carrying Knock Off, which makes setting up lategame far more difficult.
- Generally speaking late game sweepers are a bit out of fashion in CAP atm as its very difficult to play 5v6 atm. Note Azumarill, Necturna, Cawmodore being near gone from anything but really HO.
Youre not wrong that sweepers are generally falling off for balance squads. But this type of setup is a fine mon for HO and seems to be the most obvious and natural fit. Is the aim to make it viable or make it splashable? (genuine question here Lasen )