Is this the big room where BT is separated from you and you have to kill time until he can join you and help? I remember struggling with this too.
I can't say much about specific strategies, but its easy in the campaign to get quickly overwhelmed with the enemies. Especially with the small bomb ones, keep moving and using the wall jumps to get them to line up behind you as they try and keep up. Then stop every now and then and take out the closest ones. When your invisibility charges up, use that to reposition yourself at a greater distance.
I think it's tempting to take cover, but the bombs overwhelm you so fast that constantly moving is almost always the better bet.
Hope that helps! Curious what other people would suggest, too.