I think there should be separate set of artifacts, that change the revive knockback.
By default it's just pushing monsters around the player now arfitact would change it to :
1) Players are also knocked back
2) Revive casts elemental nova instead of knockback
3) Revive also casts random Magick at the location
4) Revive has a low chance of transforming revived player
And for hardcore players :
5) Revive spell can't be used without cooldown.