Well, here's my adjusted Feats list:
--- Pre-epic - 7 +1/human --
01 SF Evoc GSF Evo -- Free: Silent/Empower/Maximize
03 SF Conjuration
06 GSF Conjuration
09 Combat Casting
12 Skill Focus: Persuade / Lore / Improved Parry
15 Extend spell
18 Resist Energy: Fire
---Epic 7 +2/RDD bonus ---
21 ESF Evocation
24-40 Epic Toughness I-VIII
---Legendary - Read: Spell Penetration Tome ---
42 LSF Evocation
45 Toughness IX
48 Toughness X
51 Leg Spell Penetration
54 Great Charisma I
57 Improved Combat casting
60 Great Charisma II
---Paragon 6 ----
63 PSF Evocation
66 Paragon Spell Penetration
69 Planar of Adaptivity I
72 Planar of Adaptivity II
75 Planar of Adaptivity III
78 Levitation or Water Breathing
--Spell List---
Level 1
Burning Hands
Negative Energy Ray (does divine damage)
Summon Creature I
Protection from Alignment
Identify (Extended gives a 4 round boost to lore)
Level 2
Combust
Flame Weapon
Vocalize
Darkness
Summon Creature II - Or something else keep in mind CL 19
Level 3
Flame Arrow (does all damage in one hit)
Fireball (does (3/4 caster level)d6; 2/3 fire and 1/3 positive)
Clarity - adds utility
Gust - useful for long range Cloud removal
Level 4
Elemental Shield - useful for Cold Immunities
Orb of Fire
Orb of Force
Stoneskin - 20/+15 Soak is the best you can get (19/+14 without CL Ego)
Level 5
Firebrand
Energy Buffer
Summon Creature V - Can be maximized for a Good to Primal Fire Elemental
Break Enchantment - adds utility
Level 6
Tenser's Transformation
Legend Lore - 19/20 Lore bonus is always good
Stone to Flesh - adds utility
Level 7
Delayed Blast Fireball
Greater Orb of fire
Great Orb of Force
Level 8
Incendiary Cloud
Summon Creature VIII
Great Spell Breach - Unlike the Dispell/Mord family, no check is involved - SR-7 also helps in a pintch
Level 9
Detonate - Produces area kickback, if the detonated target has kickback
Meteor Swarm
Notes:- It's possible to swap Improved Combat Casting and the last paragon feat for 2 more ranks of of Great Charisma - However Improved Combat casting has great sinergy with RDD aura and Detonate
- Levitation provides immunity to some toss attack (unless the RDD Wings already do that - need to confirm)
- Having all Planar of Adaptivity feats make you less reliant in GR (with Demi x5 you don't ever need to bother Layer's DC penalty)
- A CL ego increases the AC you get from tenser's Transformation and your spell damage. DC and Spell Penetration Ego are very useful as well.
- I like the Spell Penetration Artifact, as the temporary CL+3 boost helps with Detonate/Boss fights.
- Even tough summons aren't overpowered anymore, it's worth memorizing what dmg each one deals at 60. Dragon Knight - (Elec) Primal Fire Elemental (Fire Pos) / Fire Drake (Acid Mag) / Efreeti (Fire Elec Pos)
- Clarity, Break Enchantment and Stone to Flesh are great spells, remember to use them on allies.
- Wingbuffet has 59 + Con modifier DC for KD - use it often (be careful with party clouds)
- Between Craft Armor, Tenser and a Large Shield, RDD+Tumble (+12) your ac should reach 130+