Why not just make a spammable "Dungeon Hunt" quest.
Same idea as the weekly hunt, but without a lockout.

You would be able to get a random dungeon hunt quest from the hunt board, which involves killing X of Y mob, and Z boss.
This would be based on a randomly selected dungeon, with ANY dungeon being fair game, but leaning towards the HW ones.
When the quest is randomly generated, a dungeon is selected. Then some mob (Y) is selected, and (X) is the number of that mob in that dungeon divided by 2. Lastly (Z) is the end boss of the dungeon.

So you could get a quest to go into Cutter's Cry. Kill (for example 10 out of 20 ant mobs), and Chimera. For completing this "Dungeon Hunt" you get (either 50 or 75, regardless of the dungeon) seals.
This gives us options.
1. Do rank 3 hunts for 75 seals per day. Or all of the HW hunts for a total of 100.
2. Go around "hunting" A's, and the occasional S.
3. Run random dungeons to get seals. Which would only help get more people gear, xp, and into HW.