You have the wrong powers and/or squadmates. If on Veteran or below, take Throw Field or someone who has it, problem solved. You can spam this so fast it's ridiculous. You can also substitute or combine that with squad Cryo ammo, too, for amazing CC results. Even Concussive Blast will make a mess on a bunch of unprotected husks.
If on Hardcore or above, the flammable or inflammable (forget which) area thing will make short work of the armor of whole groups, that can then be quickly and efficiently dispatched with the methods discussed above.
Problem with Husk? Neural Shock will solve it, just use it to 1h kill them.