Garrus will have a team, but some of them will be surprising. His rationale is that Sidonis betrayed them because he was put in real danger. So if he's going to do this right, this time his team will be able to put his old team to shame. He's not going to have an army, just a core group, better equipment, and better plans. It's less an army and more a movement, this time around.
And yes, Mordin provides the gear. That thing he did in the initial scene? That allows a Non-biotic to simulate the Charge ability, providing site to site teleportation.
And yes, Mordin provides the gear. That thing he did in the initial scene? That allows a Non-biotic to simulate the Charge ability, providing site to site teleportation.