Elva hesitated for a moment as she prepared het next move. the man hadn't been fighting like she'd have expected him to at all. She had expected more spells, and less sword-swinging. Still, if he was holding back... Dismissing her misgivings, she darted in, a spell ready at her finger tips.

Spoiler: actions
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move action: close in to flank the man
standard action: cast touch of idiocy. This is a melee touch attack that inflicts a 1d6 penalty to all three mental stats (can't drop them below 1) for 50 minutes. No save, but I do need to land the touch attack.

melee touch attack: (1d20+3)[11] note: if this guy doesn't have blindsight, he's denied dex to AC, and I get +2 to the attack roll from being invisible (ends after casting the spell). Assuming I'm successfully flanking, add a further +2.

mental stat penalty: (1d6)[6]