One of my players is a brawler. He just reached level 8 and got improved two weapon fighting. He asked what his attacks were suppose to be and I went to tell him, only to find out that I didnt know what the feat was getting at exactly.
So at level 8 the brawlers bab is 8/3.
When using twf it becomes 6/6/1 (using light weapons)
When using itwf it becomes 6/6/1/1 (using light weapons)?
When he reaches 15th level bab is 15/10/5, or 13/13/8/3 with twf, or 13/13/8/8/3 with itwf, so with gtwf its 13/13/8/8/3/3?
Two weapon fighting had such a helpful table for figuring this out.