[Blitz]

Okay, you're confusing me again... are you talking about Nether Darts (Evocation-7), or Nether Bolt (Evocation-4)?

Well you use one, then when you get the tech you use the other =)

Doesn't the feeblemind effect hurt normal troops at all, or is it just commanders?

Hurts everyone

And I imagine it does provide good spell backup, but I'd be seriously worried that something would take out your Seithkonur before they can start volleying. I assume you carry a SoS for that, but even so, how many rounds before you start 'firing'? Do you buff with protection spells first, or trust to no one getting to the Seithkonur?

Latergame I usually have a SOS with me (pretender forged). I usually give the seithkona 5 skeleton guards each, with just group protection cast on the lot of em.