Season's Herald
Stats:..........Level 1 (28 pt build)

Strength............8
Dexterity...........10
Constitution.......16
Intelligence........8
Wisdom.............18(+ level ups)
Charisma............8

Stats:..........Level 1 (32 pt build)

Strength............8
Dexterity...........14
Constitution.......16
Intelligence........8
Wisdom.............18(+ level ups)
Charisma............8

Feat Progression:
Level 1   : Maximize Spell
Level 3   : Empower Spell
Level 6   : Quicken Spell
Level 9   : Spell Focus Evocation
Level 12 : Heighten Spell
Level 15 : Empower Healing
Level 18 : Greater Spell Focus Evocation
Level 21 : Great Wisdom
Level 24 : Intensify Spell
Level 26 : Epic Force Spellpower
Level 27 : Ruin
Level 28 : Hellball
Level 29 : Arcane Pulse
Level 30 : Greater Ruin
Level 30 : Scion of the Plane of Fire

Add Mental Toughness if Human

Skills: Concentration, Spellcraft, Heal

Add Spot if Human/Drow

SH builds will want Extend for Body of the Sun.  It can be swapped out around 20th when they transition into sitting in water over fire forms and when buff durations are as long as they are going to get without it anyway.  Before then it is a walking wall of fire that melts the mobs away, and extend doubles the duration since it counts as a buff.

Evo focus and greater evo focus are optional.    I build with evo focus but not greater, that opens up the evo specs in a couple EDs.  Druids do not need high evo DCs to be very effective as their spells are typically AOE or no save.  EQ is both AOE and recurring save, and against a typically lousy save stat.

Working with your build frame I'd change:
Level 12 : Heighten Spell
Level 15 : Empower Healing
Level 18 : Greater Spell Focus Evocation

to:
Level 12 : Extend
Level 15 : Heighten Spell
Level 18 : Empower Healing

With a note that they can do a free feat swap at ~20th (or whenever they notice that they are sitting in water form more than fire, which should be around there) to swap out extend for gr evo focus.