Spell Resistance and Spell Absorption (Ioun Stone)

[RegUS PatOff]

I'm puzzling over some potential interactions & could use some RAW input.

First, Spell Resistance. Spell Resistance states that "A creature's spell resistance never interferes with its own spells, items, or abilities." Does this allow a spellcaster with Spell Resistance to cast haste on multiple targets, including herself, and have it affect herself without an SR check?

I ask because we've always played that casting on self caused an SR check unless you drop SR for the round. We've always taken the quote above to indicate it doesn't interfere with existing spells, items & abilities, but not newly cast ones.

Second, Lavender and Green Ellipsoid Ioun Stone. While the description of this stone doesn't indicate what type of action it is to absorb a spell, the Wayfinder resonance entry for this stone indicates "If the bearer is holding the wayfinder, he may use the stone's absorption ability as an immediate action instead of a readied action." In the case of this ioun stone being used by a creature with Spell Resistance, does you first check SR, then absorb (assuming you had the action to do so), or does absorption come first?

Lastly, my search-fu hasn't turned up any errata entries for the ioun stone, but if it's a readied action to use it without a wayfinder, it's value goes down dramatically. Is there any errata out there that changes the type of action?

[kestral287]

SR: The caster doesn't need to roll for her own Haste, but she should roll for the others if they have SR.

Ioun Stone: Counterspelling is, for some reason, valued rather highly in PF, and that's more or less what the stone is. So there's that, on the cost.

I would resolve spells vs. defenses thusly, personally:

Counterspell -> Immediate action defenses -> SR -> saves, damage, etc.

However to my knowledge there's no rule on how that's handled.