Me2 Beste Loyality Skill. Another good choice would be an ammo power like armor piercing. After completing the main mission on horizon, miranda's loyalty mission can be started by gaining her trust through conversation aboard the normandy.

The galaxy can be a massive, sometimes overwhelming place, and exploring it in mass effect 2 can be an overwhelming undertaking. Grunt ends up loyal whatever happens, and his being loyal has a direct consequence in mass effect 3 as well as the rest of me2. Good if you prefer gun fighting over cautious attrition battles (which is pretty much the best way to beat insanity).