User blog comment:Godofcyanide/TFL Domination - A Guide to Success at Transformers: Legends, Part I/@comment-12655751-20130719113345/@comment-9890645-20130723060020

The amount of upgrade varies with card strength and perhaps rarity - the only strength overlap is between R1 and R2. I'm not sure what the episode amplifier is for upgrade with cards, but I'd guess around double.

In general, unless i need cards for immediate upgrading, I sell off R1 and R2 and use R3 for fodder. I transcan the R3s if my base fills up too much; the T'd cards are pretty potent compared to regular R3s for upgrading.