If you can switch/retrain your class levels, definitely do so. Switch to
Wild Shape Ranger 5/ Master of Many Forms 8/ Nature's Warrior 1/ Warshaper 4/ MoMF +2/ WS +1, in that order. Your feats should be Track (R1), Combat Reflexes (H), Power Attack (1), Alertness (3), Endurance (R3), Leap Attack (6), Blindsight (9), Robilar's Gambit (12), Improved Initiative (15), Defensive Sweep (18), and Improved Elemental Wild Shape (21).
Leap Attack is in Complete Adventurer. Blindsight is in Masters of the Wild, it grants you Blindsight 120 feet, since according to
WotC's feat index there is no newer version to supersede that one. Robilar's Gambit and Defensive Sweep are in the PHB2, and Improved Elemental Wild Shape is in the DMG at the back of the Characters chapter. Use the Distracting Attack ranger variant in PH2, and all of your 1st level spell(s) prepared should be Rhino's Rush from the Spell Compendium. Your Nature's Warrior trick should be Nature's Weapon.
Get a Belt of Magnificense +6 from the Miniatures Handbook, it grants an Enhancement bonus to all six of your ability scores for 200,000 gp. Add the properties of a Monk's Belt to it for x1.5 the cost, or 19,500 gp, and remember that it adds your Wisdom bonus to AC. Add the properties of a Belt of Hidden Pouches for x1.5 the cost, or 7,500 gp. Wilding Clasp it for 4,000 gp, for a total cost of 231,000 gp.
Get a Cowl of Warding from Magic of Faerun, it takes a head spot and grants constant Freedom of Movement and Mind Blank, plus it turns six levels of spells each day as though by Spell Turning, for a cost of 200,800 gp. Add the properties of a Circlet of Mages four times (for twelve charges/day) at x1.5 the cost, or 30,000 gp, which allows you to retain a spent 1st level spell 12 times each day. Wilding Clasp it for 4,000 gp, for a total cost of 234,800 gp.
Get a Gemstone of Heavy Fortification from the Draconomicon, it costs 35,000 gp, and Wilding Clasp it for 4,000 gp. You can Wild Shape into a dragon form and permanently embed it into yourself, so you'll always be immune to critical hits and sneak attacks. Add the properties of the Clear Spindle Ioun Stone for 4,000 gp, the Iridescent Spindle Ioun Stone for 18,000 gp. Total cost is 61,000 gp.
Get Bracers of Armor +10, which is
not an epic item, for 100,000 gp. Get it enchanted with a +5 Enhancement bonus to its armor bonus for 100,000 gp. Add the properties of Armbands of Might at x1.5 for 6,150 gp, and Armbands of Elusive Action ten times (for ten charges/day) at x1.5 for 12,000 gp. Wilding Clasp it for 4,000 gp, for a total cost of 218,150 gp.
Get a Shirt of the Fey for 15,000 gp, add +5 Resistance to saves for 25,000 gp, add a +5 Enhancement to natural armor for 50,000 gp. That pricing is from the Magic Item Compendium page 234. Add Armor Spikes that are +1 Valorous from Unapproachable East, which causes you to deal double damage on all attacks after a charge, at a cost of 8,350 gp. Wilding Clasp it for 4,000 gp, for a total cost of 102,050 gp.
Get a Ring of Evasion for 25,000 gp, add Deflection +5 for 50,000 gp, and add the properties of a Ring of the Darkhidden at x1.5 for 3,000 gp. Wilding Clasp it for 4,000 gp, for a total cost of 82,000 gp.
Total cost for all that should be 929,300 gp, leaving you 70,700 gp for whatever else you want.
You can full attack with Unarmed Strikes and use natural weapons as secondary attacks, or full attack with natural weapons as desired. You can take the form of a 12-headed Cryo- or Pyrohydra, which with Robilar's Gambit will give you a 12-bite AoO every time you're attacked, plus you'll have Fast Healing 22 in either form
and you'll get their breath attacks. You can take the form of
any creature up to 16 HD that has an elemental subtype, and gain all of its supernatural and extraordinary special attacks and qualities. Warshaper allows you to change forms at will without using up one of your daily Wild Shapes. Note that the
Complete Adventurer Errata adds your Master of Many Forms levels to your maximum Wild Shape hit dice. Your next epic feat should be Spellcasting Harrier. Good combat forms to take include War Troll (MM3), Cave Troll (MM3), and 12-headed Hydras. At the end of each day switch into an Immoth (MM2) and make Ice Runes of all your remaining Rhino's Rush spells, which if you didn't use any should be at least 13 considering your Circlet of Mages charges. Ice Runes last forever regardless of your form, so even if you're out of Rhino's Rushes you'll still probably have some of those saved up.
With Armbands of Might you can Power Attack for -2 to hit and get +4 damage, which is increased to +8 when Leap Attacking which is not given as a multiplier, so the increased damage is doubled to +16 when charging due to the Valorous enchantment, or tripled with Rhino's Rush (doubled again) for +24. It doesn't look like much, but when a 12-headed hydra's full attack goes from 36d10+360 to 36d10+648 that tripled +8 for Power Attack on twelve attacks really starts to show. Plus you'll get another twelve bites like that every time you're attacked using Robilar's Gambit.
In War Troll form you'll get its DR, Regeneration, and SR, and remember that whenever you heal HP damage, such as from Fast Healing, you heal an equal amount of nonlethal damage, such as from Regeneration. Note that when Regeneration converts damage into nonlethal damage, it stays as nonlethal damage regardless of your form, so you can switch into hydra form and fast heal both your regular damage and your nonlethal damage at the same time. Also remember Warshaper grants you fast healing, which is in addition to what you get back from Regeneration.
