I got to eyeballing the pre-gen characters I did for Liber Fanatica #7 and calculate that this is the order of toughness of character:
Swordmaster > Ironbreaker >> Trollslayer >>> all other non-spellcaster classes
Swordmaster can wear any armor and gets a massively powerful weapon. That beats the ironbreaker.
The Trollslayer being next on the list with Wardancer having the weaker career ability.
Is this assessment correct?