TF - wood cladding on fire cement board .. order of wall build up

[FIIFIO Self Builds]

We have had BC approved using A1 cement board to clad our barn and then we can finish in black feather edge for the look we want. Hinsight we should of got TF to replace osb outer with fire board but here we are 
we are deliberating build up order 

preference TF, fire board, batten feather edge. 
any comments or others done simular 

 

thanks