How sure are we that the blood sacrifices actually achieved anything? Melisandre seems to take all the credit when Robb Stark got killed by the Lannisters/Boltons/Freys and Joffrey got done in by Littlefinger and Olenna.

The smoke demon she conjured up to dead Renly was just with a taste of Gendry wasn't it?

The Red Bitch is on some fucking David Icke coincidence-not-causality bullshit!