Does anybody remember who their first choices were for the ME2 endgame?

For hacking the base's machines and opening the door, who better to send than a super advanced machine? I chose Legion.
For an experienced leader everyone would follow in the second team? Garrus.
For a biotic to hold up the field through the nano-swarm? Jack. She was created to be a super biotic.
For someone to guard the Normandy crew to safety? Grunt. Krogan are born meat shields.