Yeah, I think you are right and It does not work. The wording was vague enough that I was hoping. I am assuming that it would let you double spell damage that requires an attack roll as long as its a 17+ on the die then?
When using the improved critical stamina trick to deal double damage, does the spell from a magus spellstrike get doubled since it inherits the weapon's crit range?
Improved Critical (Combat): When you hit with an attack and the roll fails to threaten a critical hit by 3 or less, you can spend 5 stamina points to attempt to deal double damage anyway. Roll as if confirming a critical hit. If this confirmation roll succeeds, your attack is still not a critical hit, but it deals double damage.[/quote wrote: