I’m definitely not unwilling to hear this perspective, I know my own experience is super limited, but why would Kixi-Taka not have access to the generic prayers? He’s got the Priest keyword which is, to my understanding, the only thing you need to do all the endless spell unbinding, invocation summoning, and generic prayers each turn on top of their warscroll abilities?
Same for fitting into battalions, maybe there’ll be a FAQ that clarifies it for units like this but for the purposes of any of the core battalions it seems like you could pick the Starblood Stalkers in the hero slot anytime you could for the normal priest, getting the rest of the crew in the battalion along with Kixi-Taka and the assigned unit types, I’m pretty sure the core book doesn’t say “you can’t put Unique units in a battalion” unless I missed it when I was theorycrafting it a little (which is also entierly possible, that PDF chugs)