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Special_K the AI in Rogue Spear and Raven shield on PC were decent if on hardest difficulty, they couldn't shoot through walls(limitations back then) but they definitely did not just stand around waiting for you (they were fairly accurate), ok they did freak out sometimes but that's with any AI.
That being said, the R6 Siege AI is on point, they flank and bust through several entry points to a room at once on occasion