Well, for a fast burst build I would rather have Osiris then Hades.
IMO Hades isn't that good even her awakening isn't awesome. For a defense build she is good but you could also run with Jeanne + Pluto (she is also a tanker)

If you want to use Pluto then you should aim for Satan awakened (she will get her awakening in august), Osiris, Amon U (to reach -50 def down)
Ex-skill: Shingens Ex-skill

For late game maybe: Shingen with Ambush, Satan AW, Pluto, Osiris and Chernobog (she is a one man army)

However you should try to get every useful SSR weapon and not for dark and light.