Upper_Krust
Legend
Hey sean! 
Well I already showed how to avoid problem this in one of my earlier posts, or rather I should say YOU already showed how to avoid this ironically.
Page 36 of the Forgotten Realms Campaign Setting. Your name is one of four on the cover, although I don't know how much input you had on the feats section (?) but I am sure you are at least familiar with the Innate Spell feat. You may even have designed it for all I know.
Anyway, if you apply the parameters of the Innate Spell feat to any monsters spell-like abilities then there is no way any of them become unbalanced.
I even think some monsters could gain innate spell-like abilities earlier (perhaps halving the Innate Spell modifier?) than they otherwise would, and still be balanced, provided the spell is intrinsically tied to their nature (eg. Succubus with enchantment spells, Ice Devil with cold spells, deva with good spells etc.)
So if you create a "fireballer" monster (or template) then it would need to be 13 HD (or possibly ECL?) before you would allow it to cast fireball at will.
Base 5 HD/ECL for fireball spell (3rd-level), we assume creature is fire subtype (or in some way fire is intrinsic to its make-up) meaning it only needs half the Innate Spell modifier (+4 spell levels = +8 HD/ECL) before it can gain the spell-like ability at will.
If you wish to have a Savage Species style progression for such a monster then its relatively simply to subdivide how many uses of the SLA the creature will have at lower power.
1/4 Innate Spell Modifier = 1/day
1/2 Innate Spell modifier = 3/day
3/4 Innate Spell modifier = 7/day
Full Innate Spell modifier = At will
"Fireballer"
Casts fireball 1/day at 5-6 HD/ECL
Casts fireball 3/day at 7-8 HD/ECL
Casts fireball 7/day at 9-12 HD/ECL
Casts fireball at will from 13 HD/ECL onward
You could even apply the Innate Spell feat negatively by assigning uses that are less than 1/day, only creatures intrinsically connected to spell sshould be able to gain this feature.
eg. 1/week = -1/4 Innate Spell modifier, 1/month = -1/2 Innate Spell modifier, 1/year = -3/4 Innate Spell modifier.
"Fireballer"
Casts fireball 1/week at 3-4 HD/ECL
Casts fireball 1/month at 1-2 HD/ECL
By the way if someone casts dispel magic on your caravan of dominated monsters you are in for a bit of trouble.

seankreynolds said:Easy. I create the "fireballer" template, which gives the creature unlimited used of fireball as an SLA. On a monster, the creature might get to use this ability 1-3 times at most because at the end of the encounter, it's dead. Depending on the base creature, this may be worth +1 to CR because the creature is tougher than normaly.
Now add the fireballer template to a PC. Suddenly you have a PC who can fireball all the time, every round, no stress ... ten encounters per day, at least ten fireballs. Encounters with groups of creatures become a lot easier, and weak threats are never a threat. This ability is certainly worth at least +1 LA to a low-level character, if not more.
That's how an unlimited-something in the PC's hands is more powerful than in the hands of a monster, even if "PC" and "monster" in this example are a human Wiz1 (i.e., a PC Wiz1 and an NPC Wiz1).
For a less explosive example, replace fireball with dominate monster. A monster might get to use that ability a couple of times before it dies. A PC with that ability quickly ends up with a caravan of enslaved monsters following behind it for the rest of his adventuring career. The ability to use an ability ten times per day is stronger than the ability to use it once per day, and if you're a monster, your lifespan is only a few rounds (so "at will" really only means 2-3 times per day), whereas a PCs is "on camera" all day (so "at will" really means "as often as I want it, maybe even a hundred times a day). Thus, again, even if "PC" and "monster" are the same thing, such as a Ftr1.
Well I already showed how to avoid problem this in one of my earlier posts, or rather I should say YOU already showed how to avoid this ironically.

Page 36 of the Forgotten Realms Campaign Setting. Your name is one of four on the cover, although I don't know how much input you had on the feats section (?) but I am sure you are at least familiar with the Innate Spell feat. You may even have designed it for all I know.

Anyway, if you apply the parameters of the Innate Spell feat to any monsters spell-like abilities then there is no way any of them become unbalanced.
I even think some monsters could gain innate spell-like abilities earlier (perhaps halving the Innate Spell modifier?) than they otherwise would, and still be balanced, provided the spell is intrinsically tied to their nature (eg. Succubus with enchantment spells, Ice Devil with cold spells, deva with good spells etc.)
So if you create a "fireballer" monster (or template) then it would need to be 13 HD (or possibly ECL?) before you would allow it to cast fireball at will.
Base 5 HD/ECL for fireball spell (3rd-level), we assume creature is fire subtype (or in some way fire is intrinsic to its make-up) meaning it only needs half the Innate Spell modifier (+4 spell levels = +8 HD/ECL) before it can gain the spell-like ability at will.
If you wish to have a Savage Species style progression for such a monster then its relatively simply to subdivide how many uses of the SLA the creature will have at lower power.
1/4 Innate Spell Modifier = 1/day
1/2 Innate Spell modifier = 3/day
3/4 Innate Spell modifier = 7/day
Full Innate Spell modifier = At will
"Fireballer"
Casts fireball 1/day at 5-6 HD/ECL
Casts fireball 3/day at 7-8 HD/ECL
Casts fireball 7/day at 9-12 HD/ECL
Casts fireball at will from 13 HD/ECL onward
You could even apply the Innate Spell feat negatively by assigning uses that are less than 1/day, only creatures intrinsically connected to spell sshould be able to gain this feature.
eg. 1/week = -1/4 Innate Spell modifier, 1/month = -1/2 Innate Spell modifier, 1/year = -3/4 Innate Spell modifier.
"Fireballer"
Casts fireball 1/week at 3-4 HD/ECL
Casts fireball 1/month at 1-2 HD/ECL
By the way if someone casts dispel magic on your caravan of dominated monsters you are in for a bit of trouble.
