Wood elf ranger x/cloistered cleric (solonor thelandira, Elf and War domains) 1/scout 3/ranger x, elf ranger substitution at 1st level for that sweet +3 bonus vs undead and a few bonus skill points
Use a greatbow, aim for Str 24, so that with reduce person you end up with 22, which is the highest listed str bonus for mighty composite greatbows.