You've got a better chance at 5 star colored awakening runes in the souls,... not via drops. I've manage to never buy that 1000frag pack.. yet I've awakened every class fully at least once, most often twice. I've only ever purchased the 1000frag pack ONCE for Assassin yesterday.. because there are so many awakenable assassin characters. The souls can drop 2 or even 3 of the 5 star colored runes.. it's rare, but it happens more than the levels drop them.