I enjoy this build for leveling, I was duoing with an assassination rogue with it:
https://classic.wowhead.com/talent-calc/druid/014050130250135--50510310501
Level 10-14: Improved Mark of the Wild 5/5
Level 15-19: Improved Healing Touch 5/5
Level 20: Insect Swarm
Level 21: Nature’s Grasp
Level 22-25: Improved Nature’s Grasp 4/4
Level 26-30: Improved Moonfire 5/5
Level 31-32: Nature’s Reach 2/2
Level 33-35: Improved Entangling Roots OR Improved Thorns
Level 36-40: Vengeance 5/5
Level 41: Nature’s Grace
Level 42-44: Moonglow 3/3
Level 45-49: Moonfury 5/5
Level 50-52: Reflection 3/3
Level 53: Nature’s Focus 1/5
Level 54-59: Tranquil Spirit 5/5
Level 60: Nature’s Swiftness
Decent healing capabilities, massive Moonfire crits and an extra DoT that reduces hit rating by 2%.
A sampling of gear from my character at level 40:
https://i.imgur.com/ythWAUA.jpg