If there is a seperate line at amp racks for each speakon output then you can split the amp feed directly to multiple outputs, you do not have to loop speakon through the monitors.
The one thing to note if that putting multiple speakers on the back of the amps will lower the impedience. Make sure that you stay within the limits of the amp.
Speakers are often 8Ohm each and most amps are able to go down to 2Ohm. I try not to link more than 3 8Ohm boxes normally to allow for cabling and give the amp some breathing room.