Spell Attack Feat Questions

[ShadowcatX]

So I'm wanting to use the dual sphere, spell attack, vital strike, and energy blade. I get that spell attack changes my "cast a spell action" into a "special attack action" and allows these things to work together, but I'm unsure how they all play together.

Does the extra damage from energy blade get increased by vital strike? Does the attack from dual strike get increased by vital strike? Does the extra attack from dual strike get extra damage from energy blade?

I think the answers will be, in order, Yes, yes, no.

If all that is correct, if I am a prodigy, and I am using follow through (the dual wielding integrated technique) will that attack gain the increased damage from vital strike? If I'm wrong and the original off hand attack gets the damage from energy blade, will this attack get the damage from energy blade?

Last question, does this feat apply to spells crafted based on energy blade?

[Michael Sayre]

The extra attack granted by dual attack does not count as an attack action and does not benefit from Vital Strike.

Stack (the author for Energy Blade) has previously stated that the extra damage from the destructive blast would be treated as bonus damage dice and not multiplied by Vital Strike; only the base weapon damage is multiplied.

Since the extra attack from dual attack is a separate action made with a separate weapon, it would not have the additional damage from either destructive blast or Vital Strike; it would simply be a "normal" weapon attack on top of your Energy Blade + Vital Strike modified initial attack.

Generally this probably would not apply to spells crafted based on Energy Blade since those effects are no longer the Energy Blade talent, and the Spell Attack feat is very specific about what it modifies.