This one is easy, being a battle cleric I would go for Harm. Even on a successful save the target takes 60pts of damage. :D
- Gauss
Harm is so good because it rocks or it rocks hard. At your current level it is 120pts of damage or 60pts of damage with a successful save. Even at level 12 that is 60pts of damage which is pretty good for a battle cleric on a touch attack.
Cast spell, move into melee, touch them, then wail on them with a regular weapon. :)
BTW, what is your current strength and charisma? Just curious.
- Gauss
Personally my first pick would still be heal, but thats because imo u can never have to many heal spells.. Sum Mon would be my 2nd pick.. The Lillend Azata gives an inspire courage +2 and can cast good hope, so a net +4hit/dam bonus for those rounds is sexy.. Also she can heal and has decent attacks and some cc as well.. A huge elemental is never bad as well.. And neither of the demons are bad if u dont mind sum them..
You have a reach weapon? Can you manage to get a reach of 15' or more?
Antilife Shell is greatly underrated.
I second Heal. Remove all kinds of conditions. Superb spell.
Have you considered Greater Dispel Magic? No party of this level should be without it.
heal is not a spell a Battle Oracle gets for free. They get mass bull's strength and mass cure moderate wounds for free, not heal.
heal is pretty much *expected* to be available by the meta-design. Unless you have other PCs in the party that have access to it - and *especially* if you are the only one in the party that can get it - heal is a must-have spell.
EDIT: Two heals are better than one. There's a decent chance when you're facing down CR 15 encounters that you'll need them both. :P
2nd EDIT: The other suggestions are all great first choices. Of the original trio, I would probably go with dust form if you're the primary melee guy or pair up with the primary melee guy.
The OP specifically said he wasn't nterested in heal because the party already had another oracle with it.
Blade Barrier is an excellent battlefield control spell.
Cold Ice Strike lets you burst down foes hard. I second this spell.
If you're good, I think Eaglesoul is an underrated buff.
Taking your whole situation into account, I would actually recommend Wind Walk or Anti-Life Shell (which won't push out your friends to my knowledge).
Wind Walk is an incredible travel spell that can really change the game for you in different ways. Anti-Life Shell seems to suit your combat style deliriously well.
One question: have you already decided on which spell to swap out? Or was that dependent on Sum Mon VI or not (to knock out V)?
The way I read anti life shell, it won't care if creatures are allies or not, but it won't block out anyone already inside the area as long as they stay inside (impossible in combat if you move as far as I can understand.) Would this be correct? I can see this being very usefull if solo, but we are 3 characters that regularily go melee. This and the 1rnd acting times bugs me.
I'm not really sure why you feel like you have to be within 10' of an ally during a fight. If you regularly increase size (which actually gives you 20' reach, since a reach weapon doubles your natural reach), I see no reason to ever be within 10' of them unless you have "when adjacent to an ally" teamwork feats. The one round cast time is annoying, yes, but it lasts 1 min./level, so you can pre-cast it a while in advance of expected fights.
I'm a bit confused on dustform. Does everything in the rules for incorperal apply? Dex as str, pass through objects, etc or just what is described in the spell?
I think Dustform needs a FAQ, honestly, because it states you are treated as Incorporeal, but part of being incorporeal is the move through objects, which seems to make the first part of the spell (squeeze with no penalty) obsolete.
I also tend to dislike spells with 1 round/level durations--that's generally only good for one fight, while minute per level can usually make it through two or even three in a densely packed area.
Summoned monsters can not teleport.