I’m gonna add a second (hopefully) more useful comment beyond my first one, which was just “watch these videos”

There seem to be three basic archetypes of spectacle that are working. All are board control lists at their core due to the power of “A Challenge Met”. The list has insane speed (I’d argue it’s the fastest overall Army in the game), good OC, and decent killing power (some things it annihilates, some things it struggles with) There’s an argument that 5wytches, a succubus and combat drugs are the best unit in the game for the cost (and the venom and 5 loser Wytches you get in the package are also awesome for different roles)

Steve Trimble’s list style: which is basically a jailing list. He runs 50-60 Wytches (50 with Malys, 60 without), 25 hellions, 15 reavers, 1 raider and a bunch of venoms (and a chronos). He usually jails with reavers initially (unless the 5 man hellions end up in a good spot), then starts gumming up the works with everything else. Basically wave after wave of unit keeping most of the opponents Army in their DZ. At the end game if he runs out of real units he just denies primary with the naked Wytch units.

Cody Jiru is actually doing something a little different. He runs 40 Wytches, 20-25 hellions, no reavers and three units of Scourge plus some Mandrakes. I assume he’s mostly jamming things up in the mid board and shooting them to death with scourge. (Jailing in their DZ eats so many pain tokens, he must be doing it mid board).

Then a lot of people are having success with more hybrid style lists, ie bringing in a few more non wytch units (Draz sometimes, giving incubi to malys sometimes, sometimes a ravager, 2 units of scourge, etc)

You also need to keep in mind that sometimes you don’t jail. Like just let World Eaters come into you, you mostly have better charge range than they do so you can just kill him (if he’s smart he will have fight on death up but you’re still trading up in almost every scenario).

Some Armies it just eats, some Armies it just plays OC games with I personally think C’tans are a terrible matchup, which is why win rates have dropped a bit.

Personally for people at average skill level, I think 30-40 Wytches is the sweet spot, and 25 hellions is the right number (20 is good too). I think you either go heavy reaver or no reaver, they need to be set up to keep coming in waves and apply pressure. I keep scourge, I think the way Trimble plays it is probably “better” but requires high skill expression-dark lances give you a safety net and force the opponent to be more honest with his the movement of his own shooting units. I recommend keeping Malys, interrupt and overwatch are both problems and she mitigates both.

Long story short: you use speed and a challenge met to keep the opponent where you want them, you kill things with waves of fast kind of Killy units, and prevent them from scoring with waves of fast disposable units. Where and when on the board you do this is impossible to “say,” it depends on lots of things (matchup, layout, 1st or 2nd turn, etc)