SirMuddy's chronology is pretty outdated. I recommend using
Roy Thomas' chronology from Conan Saga #72-95, that is the best official source for the magazines, but Roy Thomas did make some errors and have not updated the chronology at all after later releases. More on this below.
The Marvel Database's order is also outdated. I was the one that started reorganizing the Conan section of that era and I can say with full sincerity I F'ed up a lot in that order, please do not use that as a basis. If you want, you can use my Western order from that site, since I did do a bit more research on that one, yet I do think that is not without errors either.
When using the Database order it's important to note it's not maintained by admins, it was an idea of one dedicated user to make his own reading order. I did chime in with the Conan, Western and Golden Age stuff (I did a lot of organizing between the 30s-1945.). While the order is impressive, it's pretty faulty and as I mentioned I did screw up in a few places when re-organizing stuff. I suggest using the Marvel Chronology Project's character chronologies or the MCP
reading order chronologies that are maintained by comic chronologists that work on that order for around 20 years now, including some past Handbook writers as well.
For Conan I recommend using the
MCP's Conan Analysis thread. Where the Conan chronology is something that can be used as a basis, Col. Fury, the now administrator of the site used a combination of Roy and SirMuddy's chronology and aspired to correct errors in both their respective timelines. Roy Thomas also did a chronology on Kull (Conan saga #97) and Red Sonja (Conan Saga #96) as well.
I also did an analysis on the most recent King Conan volume and how it fits into the chronology and more importantly how it shuffles up some of the King Conan issues in the MCP order, but more on that later. I did read through the entire Hyborian Age using the MCP chronology and I can vouch for it being close to perfection.