You must use your fists as your weapons.
No gloves may be worn.
Everything else can be worn but it HAS to be leather.
You can only go to + alignment, so no chaotic gods.
You have to read every single thing you find when you find it. Books, scrolls, etc.
Vermis is, in my opinion, the best weapon in the game. Not only is it fast and deal heavy damage, but it also gives you telecontrol, teleportitis (teleports you every now and then) and can teleport your enemies.
Also, lightning usually only bounces off walls. You might just be getting lucky.