I am trying to figure out what the usage of 5* battle items is (Hunter Lodge crafted).
Raids/Alliance War/Tournaments - You can’t use battle items.
Challenge events - Restricted to 4* battle items.
Maps/Common/Uncommon/Rare Quests - Too easy to justify 5* battle items.
Seasonal events - I get the impression people who are long enough in the game to reach Hunter Lodge don’t need these items to complete these events.
Titans - I get the impression the later 5* battle items are too expensive for the reward here.
The only usage I could guess is in Class Quests for classes the player does not have strong enough heroes.
Anything else?
From what we have seen so far of Season 3 hard, levels have a way bigger difficulty that the ones in S2, SO MAYBE those items will carry more value to finish S3 hard in a few months.
Harpoons definitely have use if they help you sufficiently with Titans. There’s a pretty good discussion in the link Guvnor posted, and I defend harpoon usage there.
They specifically help me deal with bad boards, and since I’m one of our bigger titan hitters, that’s important.