At some point the Fist-Spear Threat Up legacy was converted to a percentage increase to the threat effects used by Wardens. This should have been reflected in the legacy text, i.e. it should read +120% Fist-Spear Threat or something like that. We'll get it straitened out 'soonish'. For now just realize that the legacy ranks for this legacy are on a different scale.

As a contrast the threat up legacies used by Guardians all add a flat number to threat. This allows them to have an infinite number of ranks as the LI increases level.