A rather high number of heavily-armed and armored humans will be your enemies for this assignment. Disabling them through your abilities (and/or squadmates') and equipping yourself with armor configurations high on protection stats are considerations. You might also consider waiting until you reach a fairly high level, such as 30 to 40, before attempting this assignment. Biotic and tech teammates will do well here, since disabling an opponent and being free to attack with impunity is anyone's dream. Throwing them around, using Singularity, Overload, Sabotage and the like works wonders.