LogFAQs > #970998611

The key things I feel are worth noting are the following:

-Garrus has no way of reaching the mortar in time. It's much farther away from his team's starting point (which is where he'd start) than from Team Zenos, and one minute of even all out sprinting is barely enough to get you like, what, a quarter of the way there, maybe?

-Mass Effect mines last ten seconds. He can't build persistent trapzones without resorting to the hardware lying around Ala Mhigo, which is not nearly as killer. IIRC he can have like, 3 mines active at a time.

-Team Zenos has total control over the terms of engagement. Zenos has allowed someone he considered a comrade to climb on top of him to ride his Shinryu form before, and this allows Yu and Kiryu to rain death from above before everyone drops down to fight. Garrus is the only character with meaningful ranged options on his team. That 1v5 goes very very poorly for him methinks.

-In the event you don't think Team Zenos would take to the skies, there's still the matter of how Garrus is split up from the rest of his team. Is it plausible Zeratul can reach him? Sure. Not Gael or Haurchefant though, and pulling the trigger on an ambush attempt with such critical numbers disadvantage is not a good look even before factoring in that my team can reflect back absolutely everything Garrus and Zeratul can bring to bear. Imagine Garrus going for an Overload and then stunning himself. That's GG, right there.

-Anything less than a disastrous victory where most of the team lies dead is recoverable from. Tifa has carbuncle to rez allies and Yu has Samarecarm. Both need to bite dust while being protected by Kiryu and Vishnu, and that's just not likely to happen.