At no point do I intended upon wielding anything more than the Eviscerator, aside from the classic bolter as a back up, which will not be used whilst the blade is in use. I question how priests and unarmored sister Repentia can wield the Eviscerator just fine, but a sister in full armor, armor which provides enough additional strength to carry heavy bolters by oneself, cannot use one. Especially a Sister belonging to a suborder that specializes in spearheading close range assaults.

If you insist upon it, I guess I could make a Retributor. I just don't see the point in being pedantic over who can touch the Eviscerator, considering it's an  option even in the actual boardgames for certain Sororitas to wield, despite not being Repentias.