quick tip: you can "super charge" your gems. Simply take a high grade gem of your choice and combine it with grade 1 gems of the same color. It will gain +1 to +3 points in min damage (even more on max damage) plus an increase to it's special. At a little most than the cost of making a grade 7 you could have a grade 6 with almost double the damage! was able to beat the final boss in one pass with just 1 of each color super gems!
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