I think there's a few spots when other gears edge out, but was just answering that Thurandaut hands would never enter the equation as they're not even the best all-in-AGI piece. AGI+14 vs AGI+15 Racc+10 (and relevant augments)
When I tried using different builds for Last Stand I generally came up with better results stacking more AGI and R.att instead of focusing on STR for the fSTR2. Skadi's, Sct. +2, and Leoht are very close however due to the AGI and Ratt being about the same I have them in that order.
Edit: Seiryu's would beat Thaumas if you had a good random augment i.e. STR or R.att