Chiv offers Consecrate Weapon, Divine Fury, Cleanse Wounds, Cleanse by Fire, Remove Curse, the last 3 which you'll need at least 2FC in order to be of any use so you don't get interrupted.
Ninjitsu for PVP unless you've got parry along with the bushido, but as an archer that doesn't work.
Ninjitsu offers poison darts/stars (but you'll need a balanced bow as you've got to have one hand free to throw) This allows you to Deadly Poison your target at a range or up close.
Mirror Image: Summon images of yourself, helps take the blow and deflect attacks.
Animal form: Run away in mount form if need be (ie: if you get dismounted)
Focus Attack: If your bow has say 50% Hit Fireball, it gives your bow X amount of added % to Hit Fireball on the next shot depending on Ninjitsu. If your ninjitsu was 120, hit fireball would now be 100% Hit Fireball on your next shot (can't use specials and still have the % bonus)
Death Strike: Isn't nearly as effective with archery anymore.
Shadow Jump: If you have stealth/hiding, it's pretty much the teleport spell, but you're still hidden when you do it.
Smoke Bombs: If you've got hiding/stealth, you can hit one of these and disappear even w/your attacked still attacking you, as long as you're not bleeding/poisoned or they cast a area effect spell, you stay hidden, and can stealth away.
Bushido on an archer is only effective in PvM really.