You can actually use Garrus as a leader unit in these battles if you choose. He'll keep them alive, I found Zaeed's ruthless style could lead to deaths.
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Ah, yeah, Garrus. He was the other one. Because we all know how well his previous team-leading excercise went over...
Garrus was my first choice as leader both times on my first play through. As far as I saw, he was the only individual with leadership experience who I thought might work. I was hesitant to use Zaeed because I figured he'd get someone killed and I didn't want to use Miranda because not all the other characters especially like Miranda and I wasn't sure if the game took that kind of thing into consideration.
I used Garrus on the basis that Garrus is a beautiful man whose babies I want to have.
I realize this thread is a little bit old, so maybe I shouldn't be bringing it back, but there is some new info.
The Overlord DLC just dropped today. It features the Hammerhead tank from Firewalker, and a good deal of geth to kill, but the writing seems sparse. A lot of action, but not as much dialogue as the main story missions. My companions haven't spoken the whole mission.
There is a good Portal reference though, so it gets props for that.
That's good they released some new stuff cuz I only one more level til I reach 30 and I need some XP. I think this is one of the few games where I pretty much completed all the achievements.