Why in gods name would you want to combine two super runes or whatever you want to call em.
An I highly doubt ya got 7 of the same one.
Random, not too important story but:
At the time with no synergia, I was thinking of suggesting a way to make fragments give xp. Then I had a thought that 'what if divine runes could give millions of xp all along'. Then I was disappoint...lol