HTBF have drops that players can obtain and never have to do again, it's universal content for solo and group players over different difficulties.

Maybe consider adding HQ drops to HTBF, or if a player has an item that drops just have the game drop a crafting item instead.

Then the player can use Synergy to turn an NQ item into a HQ if they have +5 crafting items from the HTBF.

Every HTBF item could be +1, this would give a lot of content for players with minimal development work. Also none of the gear would be OP, since the stat boost to HQ would not have to be massive.

example