You can use javascript action
Since the action have only 3 arrays parameters as output you should use 2 actions.
First action script
var length = arrInput1.length;
var temp= length/5 ;
var tmparry = arrInput1;
var size = Math.ceil(temp);
var arrOutput1 = tmparry.splice(0,size);
var arrOutput2 = tmparry.splice(0,size);
var arrOutput3 = tmparry.splice(0,size);
The second javascript action
var length = arrInput1.length;
var temp= length/5 ;
var tmparry = arrInput1;
var size = Math.ceil(temp);
var temp2= length-4*size;
var x = tmparry.splice(0,size);
var y = tmparry.splice(0,size);
var z = tmparry.splice(0,size);
var arrOutput1 = tmparry.splice(0,size);
var arrOutput2 = tmparry.splice(0,temp2);
The array output fields will use 5 different array parameters
Hope this help , you probably can find other options to do that.