Merc Pyramid is indeed tough. You'll want enfeeble to greatly reduce the lesser multiple projectile mobs. Those stats are a tad low, bit odd as it's low ES and low HP. Now might be a good time to focus on more ES, most would shoot for several thousand before progressing.
I had to grind Fellshrine until lvl 69 in order to progress, so you may want to buckle up and run that map for a bit.
I had to grind Fellshrine until lvl 69 in order to progress, so you may want to buckle up and run that map for a bit.