I am using hybrid/overlay function with soft and lj/cut/coul/debye pairwise potentials.
I wasn't sure about the order of sigma epsilon kappa and cutoff variables when I was writing pair_coeff function for lj/cut/coul/debye potential.
Also, there is no difference with using the lj/cut/coul/debye potential
by itself (w/out pair hybrid), other than that you insert the
lj/cut/coul/debye name as the 3rd arg.
The doc page doc/pair_lj.html describes the debye command and
gives examples of the pair coeff command. The description of
the pair coeff command on that page applies to all the pair
potentials including the debye flavor.