Nice Draconium! Looks pretty good from here. Agreed on the power level of Nega-touch, guess I was basing it more on Force Dart for some reason. so here goes the revised version.
Nega-touch [Reserve] (Segev/Extra_Anchovies)
Prerequisites: Able to cast a Necromancy spell of at least 3rd level.
Benefit: As long as you have a Necromancy spell of at least 3rd level available to cast, you may activate this feat as a melee touch attack for one of two different effects: If your target is Living (has a Constitution score or is a Plant that is not also Undead) you deal 1d8/level of the highest level Necromancy spell you have available to cast as Negative Energy Damage; If your target is Undead you instead cause it to flee as if panicked (Will save DC 10+Highest level Necromancy spell you have available to cast+your Casting Stat mod for that spell) for 1 round per level of the highest level Necromancy spell you have available to cast, or until you make an attack against the target. This is not a Fear or Mind-affecting effect, and only works on creatures of the Undead Type. This feat has no effect on creatures or objects that are neither Living nor Undead.
In addition, you cast Necromancy spells at +1 Caster Level.
That look a little better?