Does any1 know how much mining exp you would get mining granite if you had:

 

Varrock armour 2/3

 

Mining brawlers (on a pvp world)

 

Sacred clay pickaxe

 

any other stat boosters

 

equipped? and is it actually worth trying to get the mining brawlers?

As to brawlers, no it isn't worth getting them. Just better to get them when you aren't trying rather than hunting people hoping you would get them as a drop.