As per my previous post on this section: I do like summoner types.
But a big thing that prevents high-level conjurer type play (in my opinion) is that from tier 7 on, you solely call up elementals. Which, as we know, tends to backfire spectacularly.
So, I was thinking : Why couldn't we implement the spells Summon Monster 7 to 9 (Or 1 to 9, but that might be a bit too much)? It would give us an alternative to greater Planar Binding as the end-all, be-all conjuration spell. Sure, not all the creatures can be called forth per the sourcebooks, but three choices for each spell level could work.
For example ( Dnd Tools was used for this, which seems to reference sourcebooks):
7th Level:
Djinni (genie)
Invisible stalker
Fiendish monstrous scorpion, Huge
8th Level
Fiendish dire tiger
Fiendish monstrous spider, Gargantuan
Celestial dire bear
9th Level:
Bebilith (demon)
Night hag
Celestial roc
However, Summon Monster should not be made available to druids.
So, thoughts?