ToME: the Tales of Maj'Eyal

It's my understanding from the talents, that when I use a Blade Threading or Bow Threading talent, if I have the appropriate weapon type equipped in my off set, it should automatically switch to that set. However, when I tried the class for the first time, the hotbar icons for the talents using the other weapons were grayed out, and clicking them told me I needed ammo or two melee weapons to use them.

Am I misunderstanding how those talents work, or is there some extra set up I need to do?

Your understanding is correct. You need at least 1 point in Arrow Stitching and Warp Blade for it to work, and your two sets must be bow (with ammo) and dual weapons.

BTW, mouse clicks on an enemy will auto-switch to bow and Shoot. Keypad movement will auto-switch to dual melee weapons and bump attack. Your main set probably should be bow for reloading, since you do not reload while your dual weapons are equipped.

I found the cause of my problems - it was the addon adding the Stoic class.