You know, every time you mention "Archon", here, and describe what he's doing, how he's doing it, and his approximate power level and pull, I really think you might mean "Justicar".
Apart from running a Sabbat Invasion plot[1], the only thing I see that might be problematic is that your Justicar and flunkies really might wind up overshadowing the PCs if you're not careful. STill, if you ARE careful, sounds like a lot of fun.
[1]: which I personally despise because I've seen them far too often but may work just fine for your group if they're less overdone locally
no subject
Apart from running a Sabbat Invasion plot[1], the only thing I see that might be problematic is that your Justicar and flunkies really might wind up overshadowing the PCs if you're not careful. STill, if you ARE careful, sounds like a lot of fun.
[1]: which I personally despise because I've seen them far too often but may work just fine for your group if they're less overdone locally