Battle Blast [metamagic]
Applied to area effect spells, this allows the caster to protect him and up to30HD of others from the effects of any area spell he casts when the centre of the area is the caster or one of his protected allies. A Battle Blast sepll takes up two spell levels higher than the actual spell
Improved Battle Blast [metamagic]
prereq: Battle Blast, one other metamagic feat
As Battle Blast but any number of creatures can be granted immunity and the centre of the area is unrestricted
Healing Battle Blast [metamagic]
prereq: Improved Battle Blast Heal Rank 8
And creature granted immunity is given 1/2 of the damage they would receive. A spell effected as such takes up a slot four levels higher than the actual spell.
Travel Casting [metamagic]
This spell can be cast by running. It takes up a slot one level higher than usual.
like quickened spell but you must take a full-action run move to use it. well to be fair its not really giving them much chance to heal, it just boosts their summoned creatures a little bit. It would hardly replace a cleric
someone gets a rod of healing battle blast-
casts meteor swarm on party / mobs with it.
24d6/2 hp healed to party members? average of 42 hp heal but its aoe to alot of people...
Except that these are metamagic feats and can't be put into wands or rods or scrolls. Last I checked there's no way to get a spell with metamagic applied into any of those items, either.
Battle Blast I like, if only you changed the HD limit to a stock number of creatures, maybe around four or five; or have an increase along with caster level with a cap on how many people can be protected from the spell. Not a big fan of Improved and Healing should be cut out entirely, IMHO. As for travel casting, that can be made as a normal feat, sort of a magical version of Shot on the Run.
This is kind of nitpicky, I admit, but I think it's icky how the first two Battle Blast feats don't scale with level; the first is 30 HD regardless of if you're level 1 or level 20, and the second is infinite.
I would make the first spell shield Caster Level x 4 Hit Dice; it would be equal to 30 around level caster level 7-8, and it'd be great for a smallish party or the melee component of a larger one. The way it's done as-is, it becomes almost insignificant at higher levels, pressuring people to get the second feat to make it useful.
Personally, I'd put a limit on the second feat's HD, making it more along the lines of caster level x 10 HD. That's not really much of an issue, though.