Too complicated and there are some wrongs in your calculations @@.
-Frost Cloud: 3hits/s
-Hail: ~1-4 hits/s.
Also, no one use Prominence or Electrocute at boss anyway. And you should consider the cast time too, its not easy to full cast Hail + Meteor when soloing without surespell.
But yeah, i agree Pyro 2 - ele 3 is better in solo boss at current stage since pyro skills are instant cast and easier to lure them to the skills range, but when ranks 7+ come wiz 3 will triump over with more skills to come.
About world boss, i think Wiz 3 is better cuz you can’t use fireball in there, Flame Ground has slow ticks and they hardly stay at the same spot over 10s.