Actually fire druids are quite powerful, you just need something for the immunities. Otherwise, windies are probably the easiest, but if you have decent gear then you can do great with a fury WW or maul/shockwave WB.
To make ur windy druid, just max out:
one point into wolf or grizzly
rest go into oak sage for life
for gear, just use:
Gloves: Magefists, or trang
Shield: SS or Lidless
2nd weap: cta
2nd shield: sig or lid
then get 10 gcs, some life scs or fhr scs, and anni, ur choice
that's about it. and yes, they're easy in hell, my druid can solo everything. i do 6.6k tornado, and 3.2k hurricane. the grizzly just tanks everything for me.