Talk:Mods 2.0/@comment-109.69.91.198-20130323102237

I believe that if you are low on credits, you can always sell fusion cores. While being one of the useful fusing source, these cores cost much more than fusing normal mods.

But do not sell mods. They will be useful after you get some. Personally, I think they should remove fusion skill up modifiers, so they could at least compete on equal grounds with all mods.

I made a  test on sentinel card (Redirection 2), vs Rare waframe skill cards.

Currently, it looks like this: Mod gets same skill up progress when fusing it with 2 warframe (rare) skill cards, which cost 1600, but when you fuse it with uncommon core, it gives you the same amount of progress bar for 800 credits more.

I checked it out even more: When you fuse 3 rare skill cards, you get the same progress bar as you would fuse it with core rare 5. The diffrence: fusion core costs twice as much (!)

I encourage you to test it out for yourself. My conclusion: using skill cards of unwanted warframes is much more efficient than fusing cores when you are leveling mods.