So for an upcoming game, I've decided to focus on building a fighter that works around the Whirlwind attack feat. As of right now I've narrowed myself to roughly this progression
H Whip Focus
1 Dodge
1 Exotic weapon proficency Whip
2 Whip Mastery
3 Combat Expertise
3 Mobility
4 Spring Attack
5 Whirlwind Attack
5 Improved Whip Mastery
6 Lunge
7 Power Attack
At this point I'm trying to think of as many ways to further increase my attack range from the standard whip of 15 feet to maximize just how much I hit with whirlwind attack. Right now I have Lunge, Enlarge person, Long arm Bracers, and the Long arm spell.
Is there any other ways to improve this concept that I'm missing so far?