Also, we shouldn't forget the place where encounter pops up. For example:
Adv. Dragoon in tight corridor, without easy escape gets easily killed by lucifer cannon, yes. Unless the one who uses lucifer gets suprised or misses the shot (lucky!), you got 2,5 seconds to eliminate lcannon wielder. And 2 secs are enough if in close contact.
Tyrant in tight corridors are unpleasant sight in human team. Rants can wipe group of 3 armored humans quite easily, if they're equipped with pulse rifles, chainguns and such, rant survives most times. Unless rant screws it.
And regen depends mostly, if someone in your team is willing to evolve to basilisk and work as booster replacement for some time, and making booster, when you reach s2. And even the foward eggs can be crucial for regen. And what comes to medkit, you need to spare it as much as you can, especially in human team assault. And besides, creep through the wall, or even booster aura, makes human life difficult. Humans can't achieve that, can they? Aliens can move behind corner, regen near boost for few secs, then press on human base, repeats the retreat again, and again, and again, until human base is destroyed, or if they can take out booster, and defend it well. Humans need to build repeater, and medistation near alien base, to keep pressing alien base. And when many wounded humans try to get to medistation, it gets crowded, while aliens can spread around booster.
In shorter words: Aliens can heal anywhere, human only got one medkit shot, and need to get back base to heal.
Every month or so, a topic like this pops up. Bullshit.
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Learn to play, then complain.
Agreed.