Does that work? I'm looking at a dual weapon build with dual thrown weapons. I can channel variant energy (Darness/negative), use HiPS, and have darkvision.

Is this a good method? are there other things I should consider?
Will I actually get Sneak attack in this circumstance against creatures or no?

Darkness no longer creates an impenetrable globe of darkness... In pathfinder, it now lowers the lighting level a step. So, generally, you can still see in/through it. If it actually lowers the level of darkness enough for dark vision to kick in... Yeah, dark vision works in magical darkness now.

is there a source for that? Everything I've read says the contrary. And this would bring the lighting down to low light or darkness easily, do I maintain concealment if I have that?

is there a source for that? Everything I've read says the contrary. And this would bring the lighting down to low light or darkness easily, do I maintain concealment if I have that?

The description for the darkness spell says exactly that.

http://www.d20pfsrd.com/magic/all-spells/d/darkness

This spell causes an object to radiate darkness out to a 20-foot radius. This darkness causes the illumination level in the area to drop one step, from bright light to normal light, from normal light to dim light, or from dim light to darkness. This spell has no effect in an area that is already dark. Creatures with light vulnerability or sensitivity take no penalties in normal light. All creatures gain concealment (20% miss chance) in dim light. All creatures gain total concealment (50% miss chance) in darkness. Creatures with darkvision can see in an area of dim light or darkness without penalty.

So yes, you can see in darkness, even if it is produced by the spell Darkness.

However, you cannot see in "supernatural darkness" like that produced by Deeper Darkness:

This spell functions as darkness, except that objects radiate darkness in a 60-foot radius and the light level is lowered by two steps. Bright light becomes dim light and normal light becomes darkness. Areas of dim light and darkness become supernaturally dark. This functions like darkness, but even creatures with darkvision cannot see within the spell's confines.

Repeat: Darkness and Deeper Darkness lower light levels one or two steps, respectively, from bright > normal > dim > dark > supernaturally dark (Deeper Darkness only), and Darkvision works in everything up to "supernaturally dark." If you have Darkvision and are in an area of Darkness (but not supernatural darkness) you can see normally, and if your opponent does not have Darkvision they are blinded and you can sneak attack.

See also: vision and light

Weirdo has it right. If your opponent cant see, you can, and you hit something that is sneak attack-able you do the sneak attack damage.

yes, in areas of darkness, if you have darkvision, you can sneak attack. in areas of dim light, you can attempt a stealth check (using all the normal stealth rules that apply) and if successful you can sneak attack.

Darkness: Heal—Creatures gain low-light vision until the end of your next turn. At cleric level 5, they gain darkvision 30 feet as well, increasing this range by 30 feet for every 5 cleric levels thereafter. Harm—The illumination level in the area drops by 1 step, as darkness, for 1 minute. At cleric level 10, the light level drops by 2 steps. At cleric level 15, it drops by 3 steps, and areas of dim light or darkness become supernaturally dark (even creatures with darkvision cannot see within it).

I'll have that...

You'll have problems if you hit cleric level 15 when you start making supernatural darkness, but until then you're fine.

Keep in mind that the list of things that don't get darkvision is fairly short. About half of the standard races have darkvision, and a good chunk of the monster types get it by default. I wouldn't count on fighting things without darkvision as your primary shtick.