Concerning the Doom arena demo, did the bot aim at average "mouse" speed? In other words, was the speed in which the bot turned and aimed its "crosshair" on its target, near the speed it would take a player to do the same with a mouse?

Assuming that the player possesses a projectile weapon, how would you go about increasing difficulty for AI entities that can only use melee, hand-to-hand combat type attacks against the player? Obviously, using "pack" strategies and having the entities attack en masse would probably increase the chances of successful attacks. For single units, it might seem that attacks would be more successful, if the attacking entity tried to remain in the player's blind spots, but the annoyance factor for players might be too high for such a tactic. The appearance of attacking entities resorting to a ridiculous amount of strafing at incredulous speeds would be undesirable. What alternate tactics would you implement or have you implemented for this circumstance?