3.  Hiryuu Shoten Ha vs Sho ryu ken
  Ranma's is obviously more flashy, but Ryu's is defintely stronger.  In a
manga published in the U.S. (Tokyama Comics I think?  Yes, I own it.) Ryu
commented that the odds on someone getting up from a *single* sho ryu ken
are next to nil.  Getting grazed by one is bad enough.  All Ranma's Hiryuu
Shoten Ha does (that I've seen) is toss someone high into the air. 

And they fall down. Hard. And out of control. And another one shot.

Hee hee hee hee hee! excuse me..
we've already discussed Ryu's personality or-lack-there-of, ne?
How's Ranma gonna make him hot tempered enough to execute Hiryuu Shouten Ha?
Him, Mr. "The Fight is All".

sweet dreams,
The Reb