Dave, sorry, I meant to ask how does rank replace the "resistant to +2 or lower" thing in your system. I did know about the concept in general, yes.
Well, I'm still working on it, but it goes something like this (this WIP and no values have been determined yet):
A Divine Rank (DR) of 5 is resistant to attacks from a DR of 3 or lower and immune to attacks of DR 0 or lower. In addition, a DR 5's attacks ignore resistance of DR 3 or lower and immunities of DR 0 or lower.
Please note that I have not set these values or the delta between them yet. I'm still thinking them through.
As for your ranks, I really recommend you go with as few as you possibly can. Why use 10 when 6 will do?
It is something I am still thinking about. I did a check after my post and I came up with 7-8 ranks, depending on whether or not I have a rank 0. To use the categories I listed in a previous post.
[TABLE="width: 300"]
[TR]
[TD]Category[/TD]
[TD]Divine Rank[/TD]
[/TR]
[TR]
[TD]Primordial Entities[/TD]
[TD]6-7[/TD]
[/TR]
[TR]
[TD]Greater Gods[/TD]
[TD]5[/TD]
[/TR]
[TR]
[TD]Intermediate Gods[/TD]
[TD]4[/TD]
[/TR]
[TR]
[TD]Lesser Gods[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]Demigods[/TD]
[TD]1-2[/TD]
[/TR]
[TR]
[TD]Quasigods/exarchs[/TD]
[TD]0[/TD]
[/TR]
[/TABLE]
The reason for the demigods and Primordial Entities have a range is that I see these as broader categories, but I could take it down to 5+0 without to much trouble
However, Divine Rank is separate from the categories above. There are many creatures that could have divine ranks that don't fall into those categories (Arch-Fiends, Arch-Fey, Aberrations, Dragons, etc.). So I think there is some value to having more, but I am not sure yet.