@DRK3: I don't have CH, it doesn't fit in the deck.
Glorious Hunt and Nilf Gate (for Peter) are the primary uses, but I also have two copies of Recon to pull Spotters early or getting Magne Division later on. It's very, very rare for Letho to be a brick.
He even got me Nilf Knight as a backup plan to Hunt or Sarah on a number of occasions, although that's not typically reliable ... still, without a big dude the deck does squat, so even a 50% chance is highly welcome.
Two days ago I used the kingslayer effect for the very first time (on Voorhis) and it won me the game XD
Actually, I think I used it once before on an empty board to win a dry-passed round two in order to keep a potential Recon on top of my deck.
Realistically, those two uses combined amount to approximately half a cookie point.