Without some kind of ability to use the target's senses, targeting spells that aren't enhanced with Malediction can be quite awkward; base rolls to hit on the caster's distance and relative speed to the target. If the undead is out of the caster's sight, then all spells will have to be used blindly.

Possession [75] 
    Based on Activation Roll [+5%] 
    Cosmic (Magic Reach Extension) [+50%] 
        The caster must still cast spells with their own body, but the effects may 
            optionally come from the target as though it were the caster 
    Telecontrol 2 [+100%] 
    No Control or Senses [-80%] 
        Use the Possession rules to initiate and maintain contact, but the caster 
            doesn't gain control of the target or the ability to use their senses 
        This also means this doesn't count as a mental attack (most undead are 
            immune to that) 
    No Memory Access [-10%] 
    Only Works on Undead [-40%] 
    One Possession Attempt Per Casting [-30%] 
    Magical [-10%] 
    Spell Components [-10%] 
        Must gesture with hands 
Level 2 [95] 
    Add Extended Duration (x3) [+20%] 
Levels 3-8 [115/135/155/175/195/205] 
    Increase Extrended Duratrion by 1 step [+20%]