I have a weapon with undead bane (disruption flares) and vib flares. It also has somewhat crit weighting.

I also got a grapple flare token.

If I get the vib flares taken off my weapon by a merchant, will I be able to add grapple flares?

Kind of risky to take the flares off the weapon unless i know that I will be able to use a flaring token, so appreciate information about using these tokens on weapons with undead bane.