The per-requisites for Master Warrior were posted in error. The requirement of Weapon Proficiency +2 should actually be Weapon Proficiency +3 to be in line with the rest of the Tier 1 Higher List requirements.
Any character that does not meet this requirement will be unable to spend build towards new skills until it is met.
Lord Antrim Ardentfyre
Order of the White Fox
Master of Defense of the Mages Guild