User blog comment:Crimson Storm Mich/Future Units Preview v2/@comment-27960787-20161117015142/@comment-27076522-20161117042815

If we don't get another thunder mitigator (and we may not for a while) she works well enough with Kanon in a mono-thunder. Without him, there'd be very few defensive buffs, and that's why I said she wasn't very good. You can now afford to use her in mono thunder because of Kanon, I'm pretty sure.

Although to make mono thunder you'll need elemental stat buffs, preferably higher than Hallelujah's. So it may still be a bit.