I splitted the original .STL in two different objects, repaired the mesh in the handle and relocated them in the printing bed for an easier printing.
For my Hephestos I had to resize a little the blade's z-axis, from about 19cm to 17.5cm.
Printer:
BQ Prusa i3 Hephestos
Rafts:
Yes
Supports:
Yes
Resolution:
0,2mm
Infill:
25%-35%
Notes:
Supports: Only touching the printing bed.
Handle rafts margin: 10mm
Blade rafts margin: 15mm
Infill is really up to you. I played with infill and wall thickness up to 1,2mm
Removing supports
Even with only a density of 10% in a grid pattern, removing supports in the handle could be a pain. Use pliers, a sharp xacto blade and some sand paper to get smooth surfaces.
You will have to sand the whole prop to get a better -less poly- look. Then you can add details from the game references.
