I'm also a fan of Flayed Ones outflanking, they can get rid of pesky heavy weapons teams and hold their own quite well against most troops. It's probably best not to give them disruption fields, leave the tank hunting to Wraiths and Heavy Ds.

I liken them less to Assault Marines and more to a more powerful version of Mandrakes, who have a very similar niche in a Dark Eldar force.