They are a bit tough compared to what went before.
From memory you face off against two melee guys and two ranged ones. You could try staying by the entrance. Get a few hits in until your health (and whatever strategy you're using) falls apart and then duck back out the door.
Catch your breath, heal up, dash back in and repeat.
I seem to remember that the second two were a bit easier to take down than the first two. Good luck.