This might not even need to be in the low power thread. I'm running a nearly identical custom (w sorcery, make a thopter, investigate), and even in my evniornment full of 2/1s as far as the eye can see, you've still got time to pop this and be happy about it.
Investigate might just be a big enough hit across all power levels.
Is it that much better than Elvish Visionary? (Which I'm guessing people don't play that much of?)
Yeah, considering how high wall of Omens gets picked she seems totally playable in cube. Also get the human tribal and incidental artifact synergy
Wall of Omens blocks very well though. This blocks....sometimes good.