Original "Bigby Hand" line of spells is overpowered. It is surely possible for someone skilled with the .mdb/gr2 extensions editors to finish original Bigby Hand models. PnP 3.5 Mage's Hands are less powerfull because they are destroyable, like summons. Forceful Bigby Hand don't knocks opponents down and does her checks in every round.
Original models are located in Data/NWN2_Models.zip:
10 - A Masterpiece, Genuinely Groundbreaking 9 - Outstanding, a Must Have 8 - Excellent, Recommended to Anyone 7 - Very Good, Deserves a Look 6 - Good, Qualified Recommendation 5 - Fair, Solid yet Unremarkable 4 - Some Merit, Requires Improvements 3 - Poor Execution, Potential Unrealized 2 - Very Little Appeal 1 - Not Recommended to Anyone