i think a speed boost would be good as well maybe decrease the cooldown because posiedon and zeus shields come back within a 20 second window i feels like for something so useful.
my eyes see fine in the darkness..
Hades is underpowered, but I believe you should be graplable and show a white halo if you run while invisible. It is intended to make you stealth, so you have to be sneaky and not run like crazy. Maybe it could give you a speed boost, but if you run, you should take the risk.
The gods overestimate themselves.