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@otter
Well… Now that I have all of my ABTF’s are atleast 13 a few 15 because of a game glitch durring an up grade…. Now I just go down the list and just upgrade the next in the cue….. I burn my material based on my next upgrade in the lab in order to get gems…. I’ve seen many posts about ABTF’s being “nerfed” as they get to level 15…. So I do not really see a need to prioritize at this time…. This is my strategy…