Welcome to the message boards Rowan. Indeed Mercs for Charter does indeed help with Pirate dungeons. That said many players here could meet you if you just post a time, time zone, where to meet and on what realm and will help you through. That fight I just did on my musketeer and it wasn't easy but I did it. Just make sure you don't have any witchdoctor companions on your crew and if you have any with witchhunter they will excel in this fight. I just posted some tips for this fight on another thread and you can read them if you like. Just keeping yourself and your crew spaced apart from each other will really help lower the damage. Stack a lot of shooters in your first few rows of companions so you can focus your attacks on them, one at a time without having to get too close together. Also put your pet away as they have a nasty habit of creating a link that will get several of you hit at once by one of their AoE attacks. You really can do this but if you don't want to solo it, then by all means, let's see who can join you when you want to try again.
Please let us know.

I would be glad to assist you. What date, time, and realm is good for you?

Virtuous Dante Ramsey