Sab-Way not working :(

Sabway works with caster characters too. Discordway is, strictly speaking, a variant of sabway using discord as the elite. Same exploitation of Soul Reaping with triple necro.
You'd be hard pressed to find a nec build that doesn't make use of soul reaping. Does that mean every nec build is related to sabway? No, in fact, sabway is just a simple union of three pre-created nec builds suited for the maintainment of melee engagement.

Discordway is a spike team, meaning that its damage is independent apart from it's hex/condition reqs, which are provided by the human counterpart to a larger degree. This allows for the player to roll any such class, as long as hexes and conditions have been arranged.

I would neither advise a caster class to run sabway, nor would I assert that discordway and sabway are mere variations of each other.