Okay, so, in a campaign that starts on Friday we're using using the Heroes of Alvena gunslinger and firearm rules in place of Paizo's in our own homebrew setting. I'm playing a 'slinger in the campaign, and it starts at level 1.
Now, looking ahead and starting to plan what feats and deeds and such to take as I level up as a gunslinger, I've come upon a bit of a conundrum.
I'll be playing a scattergun-focused 'slinger, stepping into melee and blasting people left and right with a shotgun. Now, here's my question.
The deed Shotgun Nightmare let's you add 1d6 of precision damage to your attacks with scatterguns, plus an additional 1d6 at level 4 and every four levels thereafter.
The deed Shotgun Opera lets you expend 1 grit point to fire two shots when attacking with a scattergun, doubling the weapon's damage if the attack hits.
Finally, Vital Strike lets you roll your weapon's damage dice twice before adding on precision and other bonus damage when you make a regular attack action.
Okay, so, a 'slinger could take Vital Strike no earlier than level 7. By then, you could deal 3d6(+2d6 precision) when firing a scattergun within 30 feet. Additionally, if using Shotgun Opera, you could potentially double this damage. Now, adding Vital Strike into the mix, would you do 6d6(+2d6 precision) that could potentially be doubled via Shotgun Opera, or would you simply do 3d6(+2d6 precision), liable to being doubled, and then an additional 3d6 on the side? It says the extra damage from Vital Strike isn't multiplied on a critical hit, but of course this is a homebrew bit of rules and the wording isn't extensive. Clearly Shotgun Opera isn't a critical hit, but it still seems wacky to be able to deal 8d6x2 with a single standard action at level 7, for the price of only two bullets and a point of grit. Anyway, what would be the most reasonable interpretation here?