There it is. I looked for it but couldn't find it. Yeah, so B4B is a 30% buff and Jump's CD is 30s, so you could hold it up to 9s for B4B and see a dps increase over using it on cooldown. I suppose you could even look at PS-Jump being 60s and say "well, that would be 18s to wait" but this all feels intuitively wrong to me, so I dunno. Especially because, all things equal, your 4th PS+Jump will always be under your 3rd B4B, but if you hold each one for B4B... The difference would be like:

200x1.15x1.1x1.5x1.3x[1.3]x3 = 1924.065 potency from PS Jump

versus

200x1.15x1.1x1.5x1.3x( [1.3]x2 + 2 ) = 2269.41 potency from PS Jump

over the usage of 3 Blood for Bloods.