So I suggest we should have the cell exchange system to exchange the cells between 3 versions of the same Nemesis.
For example: I want to use Samael the Plague Carrier, but I have a lot of Fever Scatterer and Disease Spreader cells. I can exchange them to Plague Carrier cells with the ratio 10 for 8... Or 1:1 but it will cost Exchange Orb which can be obtain in Arena, Dungeons.
For our benefits, pls reply and upvote this to make it comes true.
Hope this will help.