User blog comment:Legionwrex/Worst enemy in Mass Effect 2 EVER/@comment-781424-20110617100709

Any individual enemy is easy when taken separately, because the damage is easily avoidable. The real trouble begins when you get caught in a supressing fire with other enemies closing up on you (especially heavy mechs). I recall a couple of places when you can stuck in a unfavorable position, like the second big room with a mech on Purgatory, or a big chamber in the end of Zaeed's loyalty mission if you rush ahead, or the worst, the Object Rho chamber in Arrival, with Project pyros and heavy mech... but any single enemy is a cake.