I am flying an SR22 with TKS de icing which is not FIKI. It works but is not FIKI.
You do not want to hang around in icing whether the aircraft is FIKI or not!
Make sure the surface temperatures are such that if you do get ice you can go down and loose it above the MSA.
You will be flying at most times at levels where you will find ice so respect that.
Do not rely on getting on top as it does not always work that way
Pace