Karima Shapandar was more dangerous than almost every one of the mass production model Sentinels. But... her cybernetics are all Sentinel tech, not even top tier Sentinel tech, but..... she makes your average Sentinel look like cannon fodder.
Sentinels are over-rated... It's tech that in theory was a real threat.... but the whole conservation of ninjutsu thing kicks in. ONE Sentinel attacking a shopping mall is a major threat... an army are just pop up targets.