Q28 Since Rapid Shot and Manyshot do not, for intensive purposes, stack with eachother, how else can an archery based class hope to scale their damage with their party without the use of the splitting property on bows and/or arrows?
There's not really a whole lot you can do. I'm facing that issue as well. If you're a fighter, or cross-class with a fighter, get weapon focus/specialization/mastery (ranged) to help, then talk to your DM about a Power Attack variant for your ranged attacks (it's Power Shot), then get Improved Rapid Shot to get rid of the -2 so you have 2 more for the Power Shot.
Finally, for items, get Strongarm Bracers, and put Sizing on your bow. You can now hold a larger weapon, and your bow will increase by one progression.
If you've got the money, get the Energy Bow. It already has Power Shot as part of the weapon, deals force damage, and the arrows deal 2d6. Finally, get haste however you can. Get boots that cast haste, and get the Speed add-on for armour and shields that give you haste for 1 round 3/day.