
Blave |

You mean spells that take enemies out of the fight if they fail their save?
Best ones are probably Calm Emotion and Repulsion. The latter only works against melee opponents and most high level creatures have spells or some other ranged option as a backup, but those are often significantly weaker than their melee attacks.
If you're also looking for high damage spells, Wail of the Banshee is pretty damn strong. Full damage even on a successful save and on a fail the target is drained 1d4, which basically translates into 1d4 * its level in damage. At the level you're usingthis spell, this probably means about 20-80 extra damage. And that's a party-fiendly AoE with good range.
But in general, the best Save or Suck spells are limited to the Occult Spell list. Synesthesia is the best debuff in the game and Synaptic Pulse will greatly shift action econoy in your party's favor.

Dubious Scholar |
Calm Emotions suffers from being incap, but a failure on it takes them out of the fight pretty well. Blindness will completely cripple a single target if you're looking at incapacitation effects though.
Ultimately... yeah, Arcane and Occult are the lists with the best debuff spells. Divine is better at protecting allies or just blasting things dead.