I dont look at it as getting 80% of my str to stamina. I look at it like losing 20% of stamina from just statting stamina. Yes, statting with alot of str would allow you to go from dps to tank in a click of your mouse, but with no str, how do you expect to hold agro?
An interesting argument.. And if you don't care about being able to DPS while not in shield form (example: farming runs), then absolutely you should be ignoring STR in favor of STA. If you stat STR you should be statting PATK also, to avoid losing agro in shield form.
Looking back through this thread, it looks like most people have leaned toward 2x */PATK stats. Some 3x, and one as high as 6x. */DEF stats between 3x and 4x. So that's the conventional wisdom, as best I can tell. Whether it makes the objectively "best", I have no clue. :p
At the moment I'm still on this plan:
Stam/Def Eternity/Bygone/Glorious
Str/HP Bygone
Str/Patk Bygone
Stam/Patk Bygone
Considering another Str/Patk (Eternity).. Maybe replace Str/HP, or Stam/Def Glorious.