>>44081085She got Inertia and more Sync Move nodes than usual (4 nodes) to buff her sync move. She also got Standfast nodes to lower the recoil from 25% to 3% if you activate them all. It gives her far more survivability, but her grid builds are expensive which means you will have to compromise.
You can either play her safely as a Sync Move Nuke with Flame Charge boosts or a Potion Dispenser, I don't see Flare Blitz builds ever being good.
Some people think it is viable to use her recoil move with Regen Units, but I haven't done the math on that yet. Regen only last 8 turns, by the way.
In the end, any Hilda grid build will be heavily dependent on team composition.