May not be the most venomous, but I would be more afraid of H. lepturus above all scorpions.
after 3 minutes of research, i am tempted to agree:
"...severe complications are known from the sting of H. lepturus. Severe and fatal haemolysis, secondary renal failure, deep and necrotic ulcers, ankylosis of the joints, psychological problems and death are reported complications. A clinical study from a region in Iran shows that H. lepturus is responsible for 12 % of the reported stings, but is responsible for 95 % of the mortalities..."
that freaks even *ME* out!
With reptiles, pretty much anything with venom is considered "hot" so it isn't quite the same terminology with scorpions. We know they are all venomous. So pretty much anything medically significant might be the "hot" you're referring to.What scorpions would you consider "hot". Snakes have rattlesnakes, etc.