Human vs Drow vs HE is more a question about feats and equipment.
Code:
INT 18 + 2 = 20 +6 = 26 +5(lvl) +1 (hm/he) +3(wiz) +2(cap) +3(excpt) = 40
+2(ship) +2(yugo)+2(lich)=46 + 2(tome/epic) +2 (tome/litany) = 50
Drow will get +2 vs +1 (hm/he). So a toon with a litany but no +3 or +4 tome, will be better as a Drow than a Human - unless you want to save the 6AP from Wizard Intelligence III.
Half Elf allows aspects like the Pally Dilettante for saves, or Cleric/FvS if don't want to focus on UMD levelling up. Both Human or HE can get to the same INT.
On the feat side for a max Necro/Enchant, TR1 human means the difference between having GSF:Enchantment/Mental Toughness or not.
Code:
Toughness
Extend
PL:Wizard
Empower
Insightful Reflexes
GSF: Necromancy
Spell Penetration <-- TR2 can drop this.
GSF: Enchantment/Mental Toughness <-- Only Human has enough feats.
Metas:
Maximize
SF: Necromancy
SF: Enchantment
Heighten
Quicken
Here is a DC breakdown.
Code:
Base Spell INT@46 SF GSF PL Item Lich Vamp Total
Nerco 10 9 18 1 1 1 2 1 43
Enchant 10 9 18 1 1 2 41
Enchant 10 9 18 1 1 2 1 42
Other 10 9 18 1 1 39
Spell Penetration:
Code:
20 Base
2 PL <- Another +2 for 2nd PL and +4 for 3rd PL. Also +1/FvS PL
2 Item <- Maybe +3 if Greater Spell Pen item.
3 Enhancement
2 SP Feat
=29
2 GSP Feat
Go read:
http://forums.ddo.com/showthread.php?t=302573
http://forums.ddo.com/showthread.php?t=303525