The Arms Compendium is a Google docs created to gather a lot of the information about Arms in one place. It has information on rotation, newest trinket sims, relics, weakauras, artifact path, talents and so on. I wrote it together with Tizank (IceCold#0888) and we are updating it as frequently as is needed. If anyone is interested in more information about Arms, or warriors in general, the Warrior Discord is an amazing resource.
I would also recommend anyone playing Arms to read this thread about Haste, SimC, and You.
If you have any feedback, suggestions, or questions please let me know on by messaging me Discord (@Vel#2944), on MMO-C, or by commenting in this thread.