Iconoclast Vs Infernal. Infernal gives you the very cool Daemonic Surge table above which can be super beneficial. Inconclast gets far better stratagems and relic than infernal.
The Iconoclast relic is pretty good so it might be worth leaving one non-Dreadblade in those detachments but the Infernal relic is trash and Dreadblades themselves get a good relic the Rune of NakTGraa. Iconoclast Knights must choose an Iconoclast Household Herpetrax Lucaris Khymere Infernal Knights must choose an Infernal Household Khomentis Vextrix but the custom traits can be for either Iconoclast or Infernal. A T9 Chaos Knight hardly needs any hype and the speed bonus is great particularly on a Slaanesh themed knight with the buffs described above giving you a 14 base move with 3 to Advance and Charge rolls.
The Lightning Cannon is perfect to boost to Str 8 and flat 4 damage.
That is a really good reroll and not just the reroll misses. Iconoclast Knights must choose an Iconoclast Household Herpetrax Lucaris Khymere Infernal Knights must choose an Infernal Household Khomentis Vextrix but the custom traits can be for either Iconoclast or Infernal. It helps mitigate one of the biggest weaknesses of knights getting smashed in melee. A T9 Chaos Knight hardly needs any hype and the speed bonus is great particularly on a Slaanesh themed knight with the buffs described above giving you a 14 base move with 3 to Advance and Charge rolls.
