Aside from obvious potency buffs, just remove slashing debuff from NIN & WAR. Despite the salt and tears from those 2, MCH & BRD don't get to apply their own piercing debuff. This also helps casters join groups if people grab SAM/NIN. NIN already has the most broken CD in the game and WAR gets buffed every single patch. This is the least they could do for SAM so they aren't locked out of PF groups 24/7.