This fight is not balanced. The gith are all a complete level 5. They have on average double the PC's group hit points, at least 2 attacks per turn (some have 3), and other very over powered attacks. They can take the main group down in just a few hits and always have initiative. The only way I make it through this encounter is to tell Lae'Zel to be quiet and have a very high persuasion character talk to them. I remember when the game first came out this battle was challenging but not impossible. Now, it us impossible. I keep trying but it is the most frustrating and unfun encounter. I usually end up just giving up and deciding "screw the creche. Lae'Zel can just deal with it". I hope that as new updates happen, and we're able to level up. I'm suck if the just below level 5 cap
They are also the last fight on the map before you find a way out that way. So, out of Early Access, I'd expect the fight to be more "even". In so far as "balanced", what party are you running? What party is Joe Casual running? What party am I running? My party has, twice now, done this encounter with no combat at all, so if it were possible to do so, I could have just hit the area transition to the next phase. No "cheese" required.