Yeah, P3 is about ~92 seconds or so. Popping everything besides X-Pot and Kassatsu (should be on CD from hand of pain) at the beginning will have it up as P4 starts.
Another tip is to make use of Shikuchi to cancel out one of the knockbacks during P2. It might take some trial and error but once you get it, it'll help increase your dps uptime.
