Airbuses would have to be the lousiest bloody climbers above
F200 at medium to high weights. They're prone to reducing
climb rate to neg esp if encountering a sudden or increased
t/w. To maintain a positive rate (and not scare ATC) keep the
managed speed and use 500fpm, and maintain a damn good
eye on your speed. If you do get distracted for any reason get
the PNF to look after it.