4box - should I make it a 3 box?

Currently running a bard and 3 mages with tank/healer mercs. Wondering if there are any benefits to dropping a mage and adding a DPS merc. I'm 77 now on all toons. I haven't really done any "tough" content yet - mostly just grinding out the levels so I can upgrade my merc to J5. Gearing would obviously be easier but besides that, any other benefits?

[firescue17]

Mage box is going to out DPS a merc easily. Mercs are junk. In my opinion, the only reason to drop a slot would be for less character management, gear farming or other administrative purposes. If you're already up and running, I'd keep it.

You would benefit from switching one Mage to a Druid or Chanter.

I thought about adding a healer but not sure if it would cause more issues with my limited ISBoxer skills. I've been following a few of your videos and the sticky in the forums which have been a major help. I'll probably keep slogging through the levels for a bit and maybe PL a healer or something later on. Boxing a bard and 3 mages is pretty easy right now.