Ectoplasmic Bonded Manifestation: When a spiritualist uses this ability and chooses ectoplasmic form, she gains an ectoplasmic shield that protects her without restricting her movement or actions. She gains a +4 shield bonus to Armor Class; this bonus applies to incorporeal touch attacks. The ectoplasmic shield has no armor check penalty or arcane spell failure chance. At 8th level, the spiritualist also sprouts a pair of ectoplasmic tendrils from her body. Once per round as either a swift or a standard action (spiritualist’s choice), the spiritualist can use one or both tendrils to attack creatures within her melee reach (using the attack bonus and damage dice of her ectoplasmic manifested phantom) or to manipulate objects. She can even use that action to have one tendril make an attack and the other manipulate an object, as long as that object can be manipulated with one hand. At 13th level, the phantom’s ectoplasm clings to the spiritualist like a suit of armor. This grants the spiritualist a +6 armor bonus to AC without imposing an armor check penalty, an arcane spell failure chance, or any reduction in speed. At 18th level, the spiritualist can take a full-round action to attack all creatures within her melee reach with her tendrils (using the attack bonus and damage dice of her ectoplasmic manifested phantom). When she does, she rolls the attack roll twice, takes the better of the two results, and uses that as her attack roll result against all creatures within her melee reach. If the better attack roll threatens a critical hit, the spiritualist chooses one target that she hit to confirm the critical hit against. The other attacks that hit are considered normal hits rather than critical threats.
So is this as if the Phantom was attacking? I.e. If the Phantom has weapon focus or improved natural attack (tentacles) could it increase everything or is it based off of the Spiritualist?
"So is this as if the Phantom was attacking? I.e. If the Phantom has weapon focus or improved natural attack (tentacles) could it increase everything or is it based off of the Spiritualist?"
yes, as if the phantom was attacking.
so you would benefit from the phantom having weapon focus or a Greater Magic Fang cast on it, but you wouldn't benefit from a Heroism spell cast on yourself.
Okay, so what about the ability modifier of the Phantom? Does this apply or do you use the Spiritualist ability modifier?
you use the entire attack bonus of your phantom, STR/DEX included. just calculate it as if your phantom is the one making a slam attack even though it isn't manifested at the moment.
Okay, second question. What about things like items the phantom has, spells on both the spiritualist AND the phantom, and activatable feats if the phantom has Power attack