Fróthi suggests seeking out other dead dragons for clues to the riddle of the Weeping Warrior's motives.
'Now, say you were to follow the path, where might it lead? Let me think. Hm... yes. If dragon bones are what this Weeping Warrior cares about, the Dale-lands are not the only place such things may be found. Can you think of any others? You are the worldly traveller, after all!'
You mention Bregmor of Forochel, Draigoch of Enedwaith, and Thorog of the Misty Mountains.
'You name familiar and unfamiliar worms, ${PLAYER}. I was not mistaken in thinking you worldly-wise! In this much I can guide you: seek Sigrun in the Misty Mountains and Fotri in Forochel. They are dwarves worthy of their beards and will be of great help to you. For Enedwaith, I am afraid, you are on your own.
'Good luck, my friend!'
The dwarf Sigrun can aid you in the Misty Mountains, as can Fotri in Forochel. Draigoch's Lair can be found in Thrór's Coomb in Enedwaith.
You should seek the bones of the dragons Bregmor, Draigoch, and Thorog.
Learned more about Karazgar, the Weeping Warrior.