One thing that slightly bothers me about Cel6 on mobile is that you can't see what Ascend will give (as far as I can tell). On web you get to see what the overall multiplier to DM/DE production will be and can use that to gauge when it is best to Ascend, on mobile it just looks like it's a pure good thing when in fact Ascending too early can like, halve you progress speed with no recourse.
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