This was my combo & order in the past, and it has worked well for me.
ATI Actinic
ATI Aquablue Special
ATI Aquablue Special
ATI Blue Plus
*Front glass panel*
Most people's feedback in the US forums feel that ATI Actinic is not very useful as it does not produce sufficient PAR, so usually they would go for 2x ATI Blue+. I would swap with the Fiji Purple to give it a try.