Talk:The Garden of Sinners Collaboration Event (US)/@comment-27718986-20180213223444/@comment-2601:140:8000:5CF4:6C87:772C:7A1D:FD72-20180214011653

There's 7 Vengeful Spirits that drop 4 Black Cats each (I believe -- 4 * 7 = 28), and 1 Rapunzel that drops 6 Black Cats (for 34 total). A +50% CE would increase the average number of Black Cats dropped to 28 * 1.5 = 42, plus 6 from Rapunzel = 48. A +1 Black Cat CE only increase it by 8 (since you're not spawning extra Vengeful Spirits without additional CEs) so 34 + 8 = 42.

So once you have the +50% CE equipped, your next CE choice (once you have them) is to either add additional VS CEs or BC CEs.

+1 BC: With 50% more VS you have 10.5 VS, plus the Rapunzel, for 11.5 additional BC per run.

+25% VS: You'll spawn 1.75 additional VS per run, so 1.75 * 4 = 7 additional BC per run.

But really, you should leave your +25% CEs alone, equip 4 of them, add a Black Cat CE if you have one, and then get a Black Cat CE from support...