i made a more non-fighter approach to spiked chains.
using the "living greyhawk deities document" (if your not allowed this, ignore this post) there is a hero-deity named tsolorandril. it is an LN deity with favored weapon spiked chain. a favored soul (FS) gains a free weapon proficiency at 1st level FS of their deities favored weapon, focus at level 3 and spec at level 12. That saves you on 3 feats. obviously int MUST be at least 13 for improved trip. this gives you the spiked chain power, divine spells (healing, buffs, item creation) and gives you more options later if you want to prestige. the living chain is a definite in the items to buy list, and if possible, have at least 2 people gain a level in marshal (minis handbook) for 2 minor auras: art of war (marshals cha. mod. to trip attempts) and motivate strength (cha. mod. to strength checks, like tripping) and if there is a third person, motivate dexterity (cha. mod. to initiative). the best part is, the first 2 auras stack because they are different.