Out of those, cable, Emma and QS can all do high lvl wbu. The others simply don’t have the damage for pve.
I would also prioritize hela, because having the best PVE ctp (energy) will of course help in pushing your wbu clears.
Since you're going to T3 Thor I assume you can do ebony WBU pretty well already. If that's the case go for Quicksilver and Cable's uni as the two have a decent range of applications in WBU. QS (Corvus, Proxima), Cable (Corvus, Cull Obsidian)