Spells like Acid Rain arent for damage, or the rider. Sure if you can trap your enemy that'd be nice but the point is to deny ground, like Miasma.
Haunted Armor is worse than Hold Person, except Hold Person can be saved out of. I guess I'd rather have Hold Person from a purely tactical POV but I'd make due with Haunting if it was on theme.
Haunted Combatant is worse than Inflict Pain, but Inflict Pain is a mind-affecting spell lots of things are immune to.
Predict Foe could be nice if you stack it with some effect that has no concentration. And there's no save. Just "-20% to your attack bonus, deal with it." I kinda like that. Bit high level though.
I'm not sure I'd let a player move through walls with Reality Bend. Unless the could normally move through walls. The spell doesn't say or imply the movements can go through things. I think this is an oversight. Could the spell be used to climb up on a balcony? If the target is willing can you just toss them 10 feet in the air? *shrug* Leaves a lot to interpretation.
Song Of The Cosmos is useless in combat. It could be used to stall some enemies for a round, or buy a few seconds to diffuse a tense situation. Most likely you would use it as a distraction out of combat though.