The sorcerers mutate, but the marines are just dust. And Thousand Sons oblits would be destroyed because their skin-fused-to-armour would turn to ash! I think obliterators are probably exacly the kind of mutation Ahriman abhorred! Thus, the Rubric.
As for tank busting, am I mistaken in the thought that sons can take Predators?
__________________ Lord of Fluff and Blood Angels Herald of Nurgle "I wield my power with the Emperor's Authority. Those who would say that I am 'radical' merely have minds too small and impotent to realize all the weapons at their disposal. Do not question my methods on account of these so-called 'Puritans'." -Inquisitor Mathias Rosenadel |