Bounty Hunter Archive

Please forgive me if this has been discussed ad nauseum but the forum search doesn't seem to be wroking for me at the moment. Is there a way, using CM, to target cloakers and do some damage with infect/neurotoxin and then hit them with an aoe or should I drop these missions or perhaps try to surprise them another day? These guys cloak as soon as they see an arrow so it's difficult to catch them off guard unless they aren't paying attention. If there is a guide can you point me in the right direction?