|Melp the Harpooner|
Melp the Harpooner can be challenging to kill largely because of his Choking Gas skill which will interrupt casting. Other than that Melp isn't a huge threat.
Melp the Harpooner will typically come in a group with 2-3 Bog Skale and 2-3 Mergoyles. The skale will take the most work to dispatch because of their Life Siphon. The usual strategy is to kill first the mergoyles, then Melp and finally the skale.