Board Thread:Questions and Answers/@comment-34705125-20180308145638/@comment-34705125-20180320124957

This is what I think:-

1) Rubedo

2) Pandora's Actor

3) Sebas (in his True form)

4) Albedo (With a World Item - Gunnungagap)

5) Cocytus (With a World Item - Billion Blades or Bowl of Hyeiga)

6) Garguantua (Because it has the highest stats of all Floor Guardians)

7) Shalltear Bloodfallen (Could be swithched with Garguantua)

8) Guren (Level 90 Hell Slime who is a battle optimised NPC)

9) Mare Bello Fiore (With Avarice and Generous)

10) Demiurge or Aureole Omega (Lastborn)

PS - This is probably inaccurate, because we haven't seen most of Nazarick's NPCs fight but this is just my opinion.