Don't get ahead of yourself, take your time, don't let yourself get overwhelmed by attracting too many enemies. Approach from angles where you can kite enemies easily, my swamp allows me to approach from high ground, hence I'm able to overlook the battlefield before I enter. Keep an open eye for enemies and muddy scrap piles you can rarely find them outside of swamp crypts.
I can't offer any other advice because I haven't "completed the swamp yet", at the same time I haven't died in the swamp. So good luck.

P.S. You can lure tolls and other enemies into the swamp, makes for some interesting fights if your close to dying as then they whittle their numbers down.