[ano]

All those artifacts require blood and astral, so this is a very powerful combo for Const8. Scepter of Corruption is a perfect item as well (together with boots of quickness)
Of more simple artifacts, the armor of souls is great for +5 MR it gives, Blood Thorn is a good weapon with drain life, not only booster, Lifelong protection is ideal for assassins and not only for them, Soul contract is a bit overpriced in my opinion, but may have a strategy based around it. Heart of life is good for reinvigoration (but don't use it with quickness)
And the best of all is Dousing Rod)))