I really really want to use one of these exotics I have just looking pretty in my Vault. Are there any combinations that work well with the lightsaber?
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You could try leaning into Spirit of the Swarm perhaps. Use a Strand super and make the Praxic Blade sever on hits to create Tangles that spawn Threadlings. And maybe also use either Spirit of the Stag or Filaments with it for survivability and/or more grenade energy if you don't want to use Feed the Void. I can see some fun Threadling spam for PvE happening with it.