using the wyches as a kind of screen for massed talos is interesting, and it's probably worth testing, but I've not seen any major tournaments report this kind of list in the top 8 so I can't endorse it to someone who wants to take the army to ITC etc

have you bought this stuff already? if so, there's not much worth saying. if not, well here we go

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wyches on foot are pretty much garbage, competitively. I don't know what you're going to do with either of those battalions, except die without reaching melee. Like, you might reach melee with one or two squads, but the rest are gonna get gunned down without doing much. and by the standards of most Chaff units in the game, wyches are both vulnerable and extremely expensive

if you really want to take Wyches, condense most of thsoe squads down to 5 and have two big squads of 20 that you deepstrike using the webway strat

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talos are cool, but their poor BS and slow movement means that a competent opponent is gonna deploy Vehicles out of range T1. Not to mention that even 18 haywires at bs4 are gonna need some luck to bring down a single Leman Russ, let alone a Knight or whatever. so they're not a reliable anti-tank backbone in a list that otherwise lacks any anti-tank.

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drop a talos from each squad, lose the cursed blade battalion entirely, have one unit of 20 wyches in the Ynnari battalion, and two squads of 5 kabalites with blasters in 2x splinter cannon venoms and swap the archon for a succubus

then take a kabal of the black heart vanguard detachment of ravagers with 3x disintegrators, because it's basically the best anti everything unit in the game