Celtic Heroes

I want to duo a second character to help my druid lvl, im thinking either rogue or ranger. My kills are effective but slow, and it's hard to find a partner much of the time.
1)Which would be an easier or more effective duo? Anyone who boxed a Druid and something wanna add their two cents?
2)Would you do a full support druid boxed with a Dps character, or should I keep my howling wind build and just double dps?
3)Would mage or warrior be a better choice?Why?

Mage and use magic lure.

Mage has incredible DPS but lacks survivability - which is resolved with druid heals.

Druid has meh DPS but has amazing survivability - which is resolved with mage lures.

So they both compliment each other. Only issue is the double energy issues you will suffer as you level higher. If you're able to sustain the sigils/lixes needed, then you will have quite a lot of fun.