turning in dain head - faction questions

[bobjonesp99]

ive got a dain head i need to turn in. ive done a couple dain hits, but probably still need 1 more before tormax will accept me.

my question is related to the OTHER factions. obviously i will need to sock tormax, but what other giant faction do i need to safely do so? do i need both kromzek and kromrif? or just kromzek?

is the best way to do this by turning in heads to kromriff recruiter (Wage War Upon The Coldain) to dubious with zek? or do i need to followup with bvellos until rif is also dubious?