Gregor-01's page

I have a 7th level Titan Fighter in PFS.

Under the archetype, the first ability is Giant Weapon Wielder:

Quote:

At 1st level, a titan fighter can wield two-handed melee weapons intended for creatures one size category larger than himself, treating them as two-handed weapons. He takes an additional –2 penalty on attack rolls when using an over-sized two-handed weapon.

As a point of reference, the original text on using an over-sized weapon:

Quote:

Inappropriately Sized Weapons: A creature can't make optimum use of a weapon that isn't properly sized for it. A cumulative –2 penalty applies on attack rolls for each size category of difference between the size of its intended wielder and the size of its actual wielder. If the creature isn't proficient with the weapon, a –4 nonproficiency penalty also applies.

However, I also have the Giant-blooded trait:

Quote:

When you wield a weapon that is larger than your size, the penalty on attack rolls for using inappropriately sized weapons is reduced by half. In addition, you gain a +2 trait bonus to your CMD against awesome blow combat maneuvers. If you’re a dwarf, your stability racial trait applies to awesome blow combat maneuvers as well.

My question is, does half reduction from the Giant-blooded trait apply to the entire -4 penalty for using inappropriately sized weapons, or does it apply to only the original -2 penalty?

Since the trait reads specifically "for using inappropriately sized weapons", I have been playing my character with the trait only taking off from the original -2 penalty, not the additional -2 from Giant Weapon Wielder. But should it have chopped the -4 in half from the get-go? Which would give me no negative now.

Giant-Blooded is a campaign trait and is not PFS legal as far as I am aware.