Sooo, my players are plowing through book 4 and are currently below Jorgenfist.
I now realised, that the Mokmurian in the Anniversary version is a different one than the one in pfsrd.
I suspect the one in pfsrd is form the og AP?
He's a 14th level wizard compared to 11th level in the AE.
Which one should I take? My party is 5 quite optimized PCs (Shaman, Arcane Trickster, Swashbuckler, Ranger, Druid).
I want to gibe them a really, really hard fight, but not an unfair one.
Also, I'm thinking of the possibilty to bring Barl back as a Runeslave in the final encoumter. That would propably be too much?
I don't think you should have too much trouble running a Lv. 14 Mokmurian - I ran him as such (including Wizard discoveries and allies) and I doubt my party would have had much trouble with it. With an oversized party like that though, I'd probably recommend adding some minor allies - maybe some outsiders called in with planar binding or Runeslaves. I wouldn't really recommend Barl unless you have a clear explanation of how he got Barl's corpse within a day of his death though.
You can find some stat blocks that might be useful to you in Joey Virtue's Guide a few threads down.
If you want a PF Lv. 14 Mokmurian instead of the 3.5 one, I could share my version with you.