1. His mask will not prevent him from inhaling lol. This jutsu is microscopic to cellular level. Only thing I can see Kakashi doing is stabing himself with raikiri but he will pretty much done once he does that.I think Kakashi only wins in these conditions
1. His face mask prevents him from inhaling C4
2. He can warp away C3 with kamui
3. His raiton defuses C3
If not, Deidara high diff.