Excellent...
I'm working on a build atm... This is what I have so far:
Class: Fighter 2 / WarMage 5 / Havoc Mage 7 / Eldritch Knight 6
Race: Human
Point-Buy: 36 (we use a house ruled 33 +1d6 point buy system)
Str 13 +1 (5)
Dex 14 +2 (6)
Con 12 +1 (4)
Int 14 +2 (6)
Wis 13 +1 (5)
Cha 16 +3 (10)
+1 Str at lvl 4, +1 Cha at lvl 8, +1 Cha at lvl 12
HP: 12
AC: 16 (10 Base, +4 Armor, +2 Dex)
At level 20, BAB will be: 14/+9/+4
At level 20, Base saves will be:
Fort: +11 (+5 EK, +4 HM, +2 WM)
Ref: +5 (+2 EK, +1 HM, +2 WM) --- Yeah, I know

Will: +11 (+2 EK, +4 HM, +5 WM)
At level 20, average HP will be: 121 (average dice rolls + Imp. Toughness + Con)
I have my progression mapped out as so:
Level 1
Fighter Level 1
BAB: +1
Feat: Power Attack (C1)
Feat: Improved Toughness (F1)
Feat: Weapon Focus: Great Sword (Human)
Skills (20): Concentration (2R), Knowledge: Arcana (2R), Profession: Sailor (2R), Intimidate (4R), Swim (4R)
Level 2
Fighter Level 2
BAB: +2
Feat: Wild Talent (F1)
Skills (5): Concentration (2R), Knowledge: Arcana (2R), Profession: Sailor (2R), Intimidate (5R), Swim (5R), Climb (3R)
Level 3
WarMage Level 1
BAB: +2
Feat: Psionic Weapon (C3)
Skills (5): Concentration: (5R), Knowledge: Arcana (5R), Profession: Sailor (2R), Intimidate (5R), Swim (5R), Climb (3R)
Level 4
WarMage Level 2
BAB: +3
Skills (5): Concentration: (7R), Knowledge: Arcana (5R), Profession: Sailor (3R), Intimidate (7R), Swim (5R), Climb (3R)
Level 5
WarMage Level 3
BAB: +3
New Spell (1st lvl):
Skills (5): Concentration: (7R), Knowledge: Arcana (5R), Profession: Sailor (3R), Intimidate (8R), Swim (5R), Climb (3R), Spellcraft (4R)
Level 6
WarMage Level 4
BAB: +4
Feat: Psionic Meditation (C6)
Skills (5): Concentration: (7R), Knowledge: Arcana (5R), Profession: Sailor (3R), Intimidate (9R), Swim (5R), Climb (3R), Spellcraft (8R)
Level 7
Havoc Mage Level 1
BAB: +4
Skills (5): Concentration: (7R), Knowledge: Arcana (5R), Profession: Sailor (3R), Intimidate (10R), Swim (7R), Climb (3R), Spellcraft (10R)
Level 8
Havoc Mage Level 2
BAB: +5
Level 9
WarMage Level 5
BAB: +5
Feat: Deep Impact (C9)
Level 10
WarMage Level 6
BAB: +6/+1
New Spell (3rd lvl):
Level 11
WarMage Level 7
BAB: +6/+1
Sudden Empower
Level 12
Eldritch Knight Level 1
BAB: +7/+2
Feat: Sudden Maximize (C12)
Feat: (EK)
Level 13
Eldritch Knight Level 2
BAB: +8/+3
Level 14
Eldritch Knight Level 3
BAB: +9/+4
Level 15
Eldritch Knight Level 4
BAB: +10/+5
Feat: Greater Psionic Weapon (C15)
Level 16
Eldritch Knight Level 5
BAB: +11/+6/+1
Level 17
Eldritch Knight Level 6
BAB: +12/+7/+2
Level 18
Havoc Mage Level 3
BAB: +13/+8/+3
Feat: (C18)
Level 19
Havoc Mage Level 4
BAB: +14/+9/+4
Level 20
Havoc Mage Level 5
BAB: +14/+9/+4
Feat: (C18)
I wanted to do some major offense. I like that the HM allows you to cast a spell and attack in the same round (as a full round action). So I wanted to qualify for Havoc Mage as soon as possible. I added the Psionic stuff so it will be easier for me to hit things in the late levels. My BAB is going to suffer, but I figured True Strike coupled with Deep Impact would help me out there. Went 2-Handed Weapon so I could do True Strike + max power attack. I also like the sudden maximize with the Battlecasting. I have a lot of options available to me depending on the situation.
True Strike + Full Power Attack w/ 2-H Weapon + Deep Impact (or Psionic Weapon)
Regular Attack + Sudden Maximized damage spell (or Sudden Empowered damage spell (or both ???)) + Deep Impact (or Psionic Weapon)
I know I am suffering a little on the AC, and my Ref save, but I'll just have to deal with it...
Any advice?