it depends what kind of ultra you are trying to do and what alignment you are currently on. Getting to N= or C- is actually easy, because N= you just need to find a lawful alter and sacrifice up to N=. C- you can just slaughter dwarfton.
Healing is used to get from L to L+, since you cannot sacrifice up to L+.
You should read the guidebook and wiki for more information.
Wins:
Gnome Assassin / Dwarven Paladin (ULE) / Ratling Duelist (UNE) / High Elf Archer / Gnomish Wizard x ~5 / Gray Elven Wizard (UCG) - Archmage / Gnomish Weaponsmith / Grey Elf Elementalist / Dwarven Priest / Trollish Barbarian / Drakling Farmer / Mist Elf Wizard / Human Beastfighter / Ratling Archer (UNE) / Gnomish Mindcrafter
Classes Left
Many!