To play the devils advocate for Khan, since the benefits of Magnus are well known (not that we can be sure gaining Magnus would trade Khan or who knows who else)
https://warhammer40k.fandom.com/wiki/Jaghatai_Khan#Horus_HeresyIt seems Khan's big gripe during the HH was simply being ignored or uninformed, the price of his desire for freedom from an Emperor who he bent the knee from clearly so that he would not be conquered himself. Being so far out and away from communications, his legion was often neglected as a result and also himself was not given up to date info.
Theoretically if we can achieve Technomantic communication of the Necrons without the need of Astropaths, and stay in good communication with the Khan and even help boost his ship engines for speed, we could gain his graces. His legion were a military sword during the Heresy, carving absolute murder on the traitor legions.
Lucius is going to be large and a big target for the traitors, alongside Ultramar. if we gain the Khan's favor to help protect our large territory via his swift speeds to deal with traitor legions, it'd be a big boon.
Btw
>Every Primarch asserted various preferences during construction: Corax had worked obsessively to make his vessels as stealthy as possible, Vulkan to make them durable and Fulgrim to make them beautiful.>In the case of the White Scars, only one change had ever been requested of the Tech-priests and only one metric was ever improved upon -- speed.I wonder what Talos ships specialty would be. My hope is automation and mass. By having as many up to date automated systems requiring minimal crew, more ships can be built and fleet sizes larger thanks to not requiring as heavy a human crew. And as a result of superior industrial capacity, 2nd Legion ships tend to be both more numerous and of the larger variety.
That or at least superior firepower and range via reliance on lance beams and energy weaponry and dispensing of conventional munitions.
Just as Talos himself might one day become taller than even Vulkan via a new heavily augmetic body.
