
Proioxis |

I have a question about Size bonuses and stacking - mainly, does something that says something to the effect of treating as one size larger, but not having them actually BE one size larger, stack with a size increasing effect?
Example: I have a set of Righteous Full Plate and an +5 Impact Greatsword. The Righteous enchantment increases both me and my weapon to Large (assuming Medium creature). Would that then count my Greatsword as a Huge weapon, giving me a 4d6 roll (I'm actually not sure whether the jump from Large 3d6 to Huge would give me 4d6, but I'm assuming it would)?
I'm also not sure about Size effects stacking and as-one-sizer-larger effects stacking with each other, although I'm pretty sure they don't.
So if I have Righteous up, and someone casts Enlarge Person on me, do I now become Huge? Or do these not stack?
And say I'm using my Impact Greatsword, giving me 3d6. Can I cast Lead Blades on it to get 4d6, or do these bonuses not stack, as they are both treating my weapon as if it is one weapon size larger without actually increasing my weapon's size?
I really want to be able to temporarily increase my size to Huge while using what's effectively a Colossal weapon, but it seems unlikely.