I decided to post this idea I had because all summons in all summoning spells are FYI, useless!
Summon Monster IX for example only allows you to summon a CR 16 creature that is only good for non-elite heroic quests and dies in one to two hits in hard or elite epic difficulty, even with Augment Summoning, 3 Druid past lives, and Grand Summoner.
I do not have experiences with software programing, but I think this may or may not require much coding.
For instance, a mage should be able to conjure a creature that equals their power, instead of always being a fixed value.
In DDO, the formulas would be something like this:
Summoned Creature = level of spell + base CR of summoned creature + caster level + destines + items + enhancements
or
Summoned Creature = base CR of creature summoned + caster level + destines + items + enhancements
or
Summoned Creature = caster level + destines + items + enhancements
or
Summoned Creature = level of spell + caster level + destines + items + enhancements
this is all mere guessing, and its only an idea, Turbine can do whatever they want with this. I do hope though that they will consider this in a similar thing in a future update to the game.
For multiclass characters, however, would not benefit from this as caster level equals the level of the magic using classes that have summoning spells in their spell book (A.G. clerics, bards, sorcerers, rangers, wizards, druids, and favored souls.)