Benben said:
The Summon Monster, and in lesser respects Summon Nature's Ally, series eventually allow for some serious magical reinforcement to appear. Couatls, Lillends, Avorals, Bralanis, Janni, Hound Archons, and Lantern Archons all have very useful special abilities. So much so that they are often times more useful staying away from melee than entering it.
The primary problem with that statement is that sumoned creatures can't buff you very well (buffs fade when the summon fades) nor can they teleport or use extra-dimensional travel. And usually their buffs are relegated to along the lines of the Aid spell (in the case of celestials) or Enlarge Person (in the case of Janni).
Couatls: available at 17th or 18th level
The standard spell list is pretty much useless to that high level of a character
There are a few decent buffs on it, but they fade at the end of the duration of the SM spell
The combat spells will never bypass SR, and even if they do the save will be successful
If it could use its Plane Shift ability for you it might be more useful of a choice, but it can't.
Lillends: available at 15th or 16th level
Other than identify, the standard spell list is a joke for 15th level characters
I suppose Speak with Animals / Plants or Knock could be useful, but at 15th level those should already
be available
Avorals: available at 13th or 14th level
lay on hands for 70 hit points might be useful (assuming you have Augment Summons for the +14 from con)
everything else is fairly useless at those levels
Bralanis: available at 11th or 12th level
For those days when you rally need a gust of wind or a wind wall?
Janni: available at 11th or 12th level
If your cleric doesn't cast Heroe's Feast or Create Food and Water this might be useful
Hound Archons: available at 9th or 10th level
none of the spell-like abilties are worth wasting a 5th level slot for
you could have teleport of wall of Force instead
Lantern Archons: available at 7th or 8th level
I suppose the fact that they do touch attacks is nice, but lantern archons are
best used in droves via gate for taking down really big critters
with crap touch ACs.
A single one in a 7th level combat isn't going to do much good.