Ultimately ulfthring is prob best till you are in FoV. Then you can get and customise the class sets; archer/viper/wizard.
While some folk seem to think ulfthring and hunter/scorpion/aleroth are better I prefer the class specific boosts from the 3 FoV sets as it let's you re-skill out a lot of points into stuff you may not be normally looking at e.g. Mana eff, bleed, summon demon for archers. Ex arrow, pot eff, again demon for warrior etc.
