When you go to, e.g., garden of fear and check the rewards it will also list only fierce. But you can get skilled/safeguard as well. This is true for any rewards tab from any map - except the old 6-sets where you can, indeed, only find the specified subtype but no other
Talking about the old 6 sets - make americe gr.., I mean make valor available again ? Last time I've seen them was from gauntlet in fall ...