I really love the simplicity of this system along with the layout and the illustrations. It's really very nice.
I like Relic too, but I'm glad that Glaive is shorter. It's a bit of a shame things like the Monster Menu didn't make the cut, but I just added the page back in during printing.
I'm wondering if the monsters from The Black Hack Classic Monsters would work for Glaive?
Example: Zombie HD 1 - 1d8 HP and does HD1+1 Damage (2 in this case, or you can also role a 1d4 if you don't want to use an average)
I also have the Monster Overhaul but it's not a light weight book. I'm guessing those don't need any conversion though?