I think this whole situation improved considerably when everyone became invisible. See? No one is around now, combat complete

~~sorcerer~~ DM

I'll also spot you that turn one is generally basic bitch shit.

It's turn seven, when the wizard has gone through six prior Save or Sucks only to find out the DM has introduced another creature on which none of them work that they're fumbling around for options.

If my druid follows you it ought to be changed, either with barriers to keep them from approaching, or to funnel them into a kill zone, or vines wrapping the opposing casters keeping them from casting spells

Your GM must be some kind of tactical genius then, seeing as how they're playing all the monsters and probably don't need to spend all that much time deliberating all their individual turns.