Save Penalties, how to get them?

[interwyrm]

I'm working on a cohort that reduces enemy saves for a level 20 one-shot.

So far, I've got hexblade 5, ravager 8, blackguard 3

Hexblade 4 alternate companion causes penalty on saves. (Can be dispelled)
Blackguard 3 aura of despair causes -2 penalty on saves in a 10ft radius.
Ravager 8 aura of fear causes penalty on saves in a radius. 3/day.
Hexblade curse causes penalty on saves (but requires a failed save to work)

Shaken condition is -2 on saves.
Sickened condition is -2 on saves.

Any ideas on how to inflict shaken and sicken condition realistically on enemies? Anything that requires a save will probably not work so well.

(I left out some of the details with the Hexblade and Ravager stuff to comply with copyrights)

 

[Aust Diamondew]

Intimidating Strike in PHBII lets you make a regular melee attack as a standard action and if you hit you may roll in an intimidate check (or something along those lines).
I think brutal strike in PHBII lets you cause an opponent to be sickened if you nail them with a bludgeoning weapons but they get a fortitude save.

Sounds like a cool character idea.