User blog comment:Avg Man/Insanity Help/@comment-4237253-20120720034612

For Mass Effect 2, being a Sentinel is immensely helpful as you get the Tech Armor power. It fully recovers you shields in a pinch, which is a godsend on insanity. If not playing as a Setinel, use the Geth Shield Boost bonus power, acquired via Legion's loyalty mission.