I've been playing a bit more with the eldritch tree, and I have to say that for what it seems to be intended for (sword and board doublestrike melee) I felt quite like an unstoppable force.

The only issue I have with it is the spell point cost of the strikes. You are forced to spam those constantly to keep up with DPS, and it drains your mana bar very quickly. Only (modestly) self buffing and keeping up death aura the entire time, constant encounters drained a 2200 SP mana bar in 15 minutes.