Talk:Fusion/@comment-24894433-20140922203048

The energy needed to rank up from 0 to 1 is only 1 if you get 100% of the mod energy (when you fuse a duplicate mod). The duplicates are the best for ranking up: 1, 3, 7, 15, 31, 63 ...last*2+1

So you need 1023 duplicates to rank it up from 0-10, or 512 duplicates to rank it up from 9-10

If you used non-duplicates, same polarity or not, you need 4x more mods, so 4092 random mods to rank it up from 0-10 or 2048 random mods from 9-10.

I tested it on uncommon and common mod, but I see no difference between the Rarity and the speed of ranking up, both 1, 3, 7, 15, 31, 63 ..