S8RXL 4 Ign ouputs on a v8 coil on plug

[iveyperformance]

Hey Guys.
I have a couple of quick questions regarding a custom configured S8
single DWB on ITB's with Traction control
this unit has 16 injectors 8 primary 8 secondary full sequential fuel
IGN system is coil on plug waste spark, 36-1 wheel with cam sensors for the sequential fueling
firing order :18736542
paired cyls : 1-6,2-3,4-7,5-8
My question would it be better to run this through a (2) 4 channel Igniters or just run 8 smart coils and split the outputs
I know it would be better to run the I/O expander and add 4 more channels fo full sequential,how ever we are trying to keep the cost down.
also in config on the S8 how would i set up this wasted ignition system.
Thanks