Talk:Damage/@comment-91.231.55.2-20171115110720/@comment-24136187-20171115120026

The Ignis is one of several weapons which will always proc a given element even if it's changed to another element.

IIRC, some melee weapons do have this, but only on slam attacks. So as long as your relentless combination build is on a weapon that can deal slash damage on normal attacks, you should be fine.