A) Yes, as your Unarmed Strike Damage increases to large size, which you use the large size variant of the section you are at (1d8, 2d6, 2d8, etc).
B) Edit: Yes, as Brawler has the same line from Monk, which allows this to work.
C) Yes.
D) No, this isn't the "unarmed strike damage of a brawler" but the Unarmed Strike of Improved Wildling feat. Even if it did, it'd be useless in four levels (since level 8 would give you 1d8).
I don't know if it'll help, but the reason for my answers is because Unarmed Damage is based on your size, for the purpose of calculating the damage, you are larger in each instance I said yes (either virtually or literally) except for C and D. C provides an exception to that because it increases your effective level by +1/4. After 5 levels of this, you'd have +1-1/4th, rounded down, one level higher. This would make it so you count as a level 6 for effects of Unarmed damage, which Close takes and subtracts 4 off of. As we are all aware, 6-4 = 2, making it so it has an effect. D is the exception because it isn't modifying the unarmed damage of brawler, merely unarmed damage.
No problem! And I understand, if you don't get any response, best bet is just to talk to him, figure out why he doesn't agree (or if he does, then no need to go through the extra work). Maybe come to a compromise? Hard to say for all GMs, but I wish you luck!
"she uses the unarmed strike damage of a brawler 4 levels lower". I take this as meaning you use the number from the class chart 4 lower than your level adjusted for size.
So
#1 enlarge changes the chart so yes.
#2 no, it doesn't modify the chart.
#3 No, you get the base die, not bonuses.
#4 No, it's not modifying the chart.
So you check your unarmed damage based on actual size for a generic brawler of 4 levels lower: that's it.
"she uses the unarmed strike damage of a brawler 4 levels lower". I take this as meaning you use the number from the class chart 4 lower than your level adjusted for size.
So
#1 enlarge changes the chart so yes.
#2 no, it doesn't modify the chart.
#3 No, you get the base die, not bonuses.
#4 No, it's not modifying the chart.So you check your unarmed damage based on actual size for a generic brawler of 4 levels lower: that's it.
I'm willing to concede that 2 might be right for you (As my logic on it is mediocre at best), but 3 seems nonsensical. As it does modify the chart, and makes your effective level for the chart higher.
"Add 1/4 to the brawler’s effective level to determine her unarmed strike damage."
So Close checks "What is level of the Brawler?" the answer back would be 5 for base level, 6-1/4th for the purpose of unarmed strikes, which is rounded down to 6. Then it checks, "does this pertain to Unarmed strikes?" To which you get the answer, yes.
With your statement that you only get the basic brawler damage, size wouldn't change it either, as that isn't the "Base Dice." As it is only "Brawler 4 levels lower," a GM could say that the Brawler they are using for this example is Tiny or Small and only level 5. It's clear that the intent is that "if you were a brawler four levels lower" and your reading very silly.
Ah... I misread the FCB. I was thinking it was giving a bonus to unarmed damage [like the catfolk monk FCB]. Now that I look again, it's a bump in level for checking damage. So yes, I was wrong on #3.
#3 Yes, it checks 4 levels lower than your effective level for unarmed damage.
PS: On size, a generic brawler check 2 things: size and level. Both these affect base damage. This is why actual size changes affect the results. It doesn't say "she uses the unarmed strike damage of a medium brawler 4 levels lower", so you need to make the size check to get the base damage.
"The unarmed damage values listed on that table are for Medium brawlers. A Small brawler deals less damage than the amount given there with her unarmed attacks, while a Large brawler deals more damage; see the following table.": both tables together list base damage for small, medium and large brawlers.
Could you refresh my memory graystone? Which side do you come down on re: sacred weapon and leadblades? Do you feel these questions are related?
lead blades increases your weapons base damage not the sacred weapon dice.
Related? Identical except for the -4 levels part.
Shifter Claws...
Shifter's claws are a bit different. It's checking her natural form's claws vs the claws from her new shape. As such, it's the natural forms size and not the current forms size that matters.