Look your problem as Watts losses and gain -- forget amps
Set the carrizos for 48 volts and 6.25 amps and parallel them to the HIPS
Two hips are set for 48 volts, so you need to place a charger controller like the MX60 to obtain the 24 volts conversion without power losses
Remember to parallel the panels with power diodes for isolation.
You will obtain MPPT capabilities which will give you around 20 to 30 % higher current
you will have Carrizo 6.25 amps , hips 7.18 amps = 13,4 amps converted to 24 volts (top voltage= 29 volts ). from 55.9 VMP
Conversion is (55.9/29 )* 13.4 amps *0.97 efficiency(MX60) = 25 amps charging current into the battery when the bat voltage is 29 volts.
If battery bank is depleted the current would be 25 *29/21 = 34.52 amps
Nando