Arthas367 wrote:This is quite impossible due to the
faq, stating exarch/phoenix lord powers only affect warriors of their aspect
Whilst this is true the argument in favour doesn't require the power to be passed to the squad so it doesn't matter that they aren't aspect warriors.
The argument is that Karandras himself has infiltrate, and since only one model needs infiltrate for the whole unit to do so, his joining with a unit allows them to infiltrate off of his ability to do so. The question is does karandras have the infiltrate ability or does he simply confer it upon scorpions he joins thereby allowing himself to infiltrate because they have the special rule.
What it boils down to is - would you let karandras infiltrate as a single model unit? If yes then he can join another unit and confer the ability to infiltrate upon them, if no then only with scorpions could he infiltrate.