there's a misconception about the birthday cards. bandori party says they have a 300 live recovery, but that's NOT true and their actual whole skill is....um a mouthful

on skill level 3, Bday Pareo (they all have the same skill):

370 Life Recovery, BAD and lower will not decrease Life for 6 secs . Score increased by 100% (lowered to 40% after GREAT or lower) for 6 secs.

(so skill level 5 should be 450 life recovery and 7 secs on not decreasing life & 100%/40% score increase)

still not as good as a regular scorer considering the lowered to 40% after a GREAT or lower part, but they're definitely better than what banpa has written on their pages lol

i highly recommend checking https://bestdori.com/info/cards for accurate material when it comes to card details like that