Even so, she can still get a lot of mileage out her bonuses, and might suffer from penalties. Dangerous Construction’s sole die can still have mods applied to it, although she’d have to be careful about overdoing the mods she channels into it or she could KO herself from the irreducible damage it produces. Returned Sanity’s dice could be modified too - they’re all effect dice in the action - but the potential number of them should makes mods less relevant.
Whispers is one of the better Boost actions in the game, especially if you can find the time to repeat it two or three times and get a +4 P&E mod and multiple temporary ones. With enough Boosts even taking basic actions to throw a big Attack could be worthwhile.
Probably going to need a minion assigned to Defend her since she lacks a strong defensive reaction of her own. She’s still very vulnerable to getting beaten down if the players realize how fragile she is, but if they take time off from minion control to do that and then fall short she’ll just heal it all and wind up ahead of the game with some minions still in play.
Interesting build, I haven’t tried that particular approach/archetype combo yet.