Your radar argument is invalid too, by the way. A radar can be fooled easily. 1) Radar doesn't update instantly. 2) Radar doesn't tell you which alien you're facing. 3) Radar doesn't tell the human what you're going to do (for example, radar tells the human you're on ground, but you can hop quickly to the ceiling and jump down behind him and slash to death) 4) A human doesn't always watch the radar, if he's having his full concentration fighting other aliens for example.
Also, basilisk is the best support class throughout the game. Try a basilisk+tyrant combo for example. Basilisk heals, gasses (slows and disorients) and grabs humans, tyrant finishes. Awesome combination.