I asked same question about IFR and flight time in our respective JAA CAA.
Answer was, that if you fly according to IFR flight plan, then you must log IFR = flight time, and total time = block time. Landings as PF, PIC if you are nominated commander (and independent of PF/PM duties), as PICUS. PICUS only until fulfilling 250hrs PIC requrement for unfreezing ATPL.