Blistering Feint and Weapon Damage

[AncientSpark]

The Blistering Feint feat has, as part of its text,

"Anytime you successfully feint a creature while using such a weapon, you may deal its fire damage to the enemy."

I have two cases where a character has a weapon attack that does entirely fire damage.

1) The first is 3rd Party, from Dreamscarred Press: The soulknife's "Fire Blade" ability:

"When the soulknife makes an attack with her mind blade, she can choose to have it deal fire damage instead of its normal damage."

2) The second is the Alchemist's bombs, which is even less clear because it says Vital Strike only applies to the first die of damage and it's not clear if they're "wielding a weapon that does fire damage".

What is the damage dealt by Blistering Feint in these two cases? Do you add the ability modifier because it converted all the damage to fire? Do you add other effects? Since it's not an attack, I imagine you cannot add conditional effects like Sneak Attack, but what about morale bonuses to weapon damage rolls?

[SlimGauge]

1) Looks like this works just fine, if the Soulknife is also an Ifrit.

2) Nope, once the bomb is thrown it is not wielded.

I would say that it is an attack, as you did have to make a combat maneuver check (those are defined as attack rolls in the rules) and it does damage.

[Wonderstell]

You won't add Sneak Attack since feint isn't a combat maneuver, it is a skill check.

I would add all the damage you'd normally would deal on a hit, with the exception of those abilities that call out an attack. So a bard's Inspire Courage would add to the damage dealt.