Board Thread:Game Discussion/@comment-10287686-20130601173125/@comment-10068656-20130601190813

Given how plentiful the medal rewards are during an event, I'd do it if I didn't have a lot of R4s on my team. Probably best to wait for the next event/episode to role around as upgrading is a lot less "expensive" resource-wise during events (your upgrades get doubled during events, I believe). Getting your Deck Power number higher at the beginning of the next event will make boss-destroying much easier for you and will up your likelihood of reeling in some event rewards (R4 cards!) at the end.