They are so stupid! They keep killing themselves! It's pretty easy to kill them, but when they get to about 1/20 of hp, they suicide... it is so annoying! And surprisingly, this level is easier than mission:13, maybe because I like to kill!
heres the advice i always give for lvl 14, use cloak and kill the human with hole grail, avoid razeunless ur at an advantage or ucan lob homing missiles around a corner and hit him, stick to high ground, and dont forget about the x2 damage multyplyer
Actually I don't think they are less smart than the other alien AI's, they are just not well equipped enough to fight two humans with more than two times their health and an infinite supply of rocket launcher ammo.
The key is to never camp. You can get almost no deaths if you camp in the lateral caves, but you need to protect your allies to get decent scores. And as rawwr said, use the Holy Grail for the first shot, and only switch to the frozen death only if the enemy survives the Holy Grail hit.
They do survive the holy grail if I don't have the 2x multiplier, the holy grail takes down only half their health if I shoot them in the body. I'm not sure if the headshots event work, I kill someone by shooting in the head, and it never said headshot.
Oh yah, gaboloth, I'm talking about the enemy Al's, but your allies suck too.... they do help a tiny bit, they kill about 3 and die 23 times... they are pretty useless..