Level 5: Druid 5 (duh) (Heard UA had Wildshaping Ranger, which would be a better bet. Don't have it tho, but getting... slowly
)
Level 6: Druid 5/ Master of Many Forms 1
Level 7: Druid 5/ MoMF 2 (Troll shape, yay)
Level 8: Druid 5/ MoMF 2/Warshaper 1 (for immunities, useful)
Level 9: Druid 5/ MoMF 3/Warshaper 1
Level 10: Druid 5/MoMF 4/Warshaper 1
Level 13: Druid 5/MoMF 7/Warshaper 1 (Get ex, no need for further levels for now)
Level 14: Druid 5/MoMF 7/Warshaper 2
Level 15: Druid 5/MoMF 7/Warshaper 2/Nature's Warrior 1 (+3 damage)
Level 16: Druid 5/MoMF 7/Warshaper 2/Nature's Warrior 2
Level 17: Druid 5/MoMF 7/Warshaper 2/Nature's Warrior 3 (Armor of the Crocodile)
Level 18: Druid 5/MoMF 7/Warshaper 3/Nature's Warrior 3
Level 19: Druid 5/MoMF 8/Warshaper 3/Nature's Warrior 3
Level 20: Druid 5/MoMF 9/Warshaper 3/Nature's Warrior 3
At epic levels, max MoMF first, then Nature's Warrior. Then go Druid. Warshaper aren't worth it, since it doesn't increase Wild Shape in any way, and it's abilities at 4th and 5th aren't worth it.
Allow me to shut up now.