Half-Bloods, yeah. Fake Gods, no. The difference is astronomical. The key card if you were to try to beat either of these would still be Phase Shields.
If you wanted to farm FG's with a Fire Lance deck, you'd have to max Phase Shields and put a Reflective Shield to target yourself with so that you could always hit the FG. That might work for a 15-20% win ratio against them or so, but that's really nothing I would advise, as a lot of them have massive creature control.
As for Half-Bloods, I'd probably focus it more; remove the creature control (Fire Shield, Rain of Fire, add Phase Shields. Other than that, it's a pretty neat deck idea.