Board Thread:Game Discussion/@comment-12049489-20131025143718/@comment-11229975-20131025144138

Not really. At best you'll get one more ruby for each level you move up. Just stick with whatever run you can get guaranteed 1 cube kills on everything (for me that's H6) and you can grind up 40 or so rubies in 10 minutes (more if you get lucky and net some things).