Watch out for Mal'Damba players, their stuns can be the end for you. Make sure to get resilience if you plan on taking them on alone to make the stunning as weak as possible. Until you get at least resilience 2, stay away from them.
Don't fight Maeve if she doesn't have low health! Position yourself to the high ground on the back so that she'll need to use her movement abilities to get to you. If she does, group up with your tank or teammates and "spam" VBE to get assistance