I have very few Fury losses.
In general, she actually helps, but I don't see any alternatives to her.
Unless, perhaps, if it's just the first-level additional building – then the Warlock is understandable.
That's why it's interesting – how much damage does Leto inflict and how often? It seems to me that it shouldn't be very much...
Dark Magic on maps where you can buy magic is effective against many factions.