Looking to start farm more aggressively doing chaos runs/Baal runs as a 2 man.

My friend only has an elemental druid but I can decide to fill pretty much any other role.

What would make the most sense for faster clears?

Anything you want, just pick something fun. There isn't really anything that will help that much. Having Infinity on your merc will help with Hurricane and Amplify Damage will boost Tornado, but the Druid can get Decrepify form the merc.

A properly built wind Druid with a Reaper's merc can clear very fast, it's a top tier char.

This. Necro with amp will help big time

Cool. We're pretty low budget still, so no nigmas or infinity's to roll with.

I do have a reaper's though and my nec is almost there to roll with him.

Thanks for the suggestions.