Sure, three drakes feels like going back to pre-pre nerf M'uru, but I promise you, jumping in the lava to avoid walls isn't going to help. If your raid can't move to pockets in the walls, you're not even gonna make three drakes at all. ;>
I wouldn't say pre-nerf(s) M'uru, seeing as it's an intense fight, but not thát hard once you got it. Also, less RNG to screw you over :>