Yeah the Legacy Champ PrC is like Monsters On Crack.
PAO once or twice, with Assume Supernatural or Metamorphic Transfer feat(s).
Custom Item of Dispel Counterspell.
Somewhere in the 2nd to 5th level range.
I mean this is T.O. but it's within some game's ballpark.
**
Something completely stupid ... in 4e Vampires can be done right away.
Get a Vamp Companion Character.
Day 1 - Round 1 ...... Bite Me.
Day 1 - Round 2+ ... OK Vamp, we don't need you anymore. Go home. Rest of party don't heal me correctly.
Day 2 - Round 1 ...... Hey I'm a Vampire.
And it's way waayyy better than the newest Essentials(4.5e) Vamp