Re: weapon focus and expertise stack?
Same bonuses do not stack.
Weapon Expertise gives a +1 feat bonus to hit.
Heavy Blade Expertise gives a +1 feat bonus to hit.
Therefore, these two do not stack.
Weapon Focus gives a +1 feat bonus to damage.
Damage is not attack bonus, therefore Weapon Focus will stack with Weapon Expertise.
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Lawful Neutral Elf Wizard/Sorcerer (3rd/2nd Level)