You still have to do a push actor away on all actors in the area or it won't work no matter how high a force you give it. Basically before actors are pushed at all, they won't enter a ragdoll state. If you set the force really high, you'll notice they stumble, but they won't actually get pushed. So here's a (somewhat complex) workaround. You make a scripted cloak spell. (To do this, make a scripted concentration aimed spell with the script you want to cast on actors, and then make a cloak spell with the conc aimed spell as its 1st associated item) The script spell does two things, it does a 0 force pushactoraway on akTarget, and it forces akCaster to cast a spell on self (for the count, the third spell you will actually have to create to get this working) that doesn't even do anything, but it has a big forceful large radius explosion.
For a radius I'd put it at about 220 (I think thats about 10 feet) and force of say 1000. Play around with it from there until it pushes them as much as you want it to.
So for the record:
1st Spell
Concentrated Aimed Script spell with this script:
Scriptname FirstSpell extends activemagiceffectevent OnEffectStart(Actor akTarget, Actor akCaster) akCaster.PushActorAway(akTarget, 1000)endEvent
2nd Spell
Cloak type self duration 1 second radius 10 feet
1st associated item 1st spell
3rd spell
Unnecesarry if you made the other two. I hadn't looked at PushActorAway in a while and didn't realize that it automatically creates a vector for you from the source to the target for direction. The way I outlined above will work, but is unnecessarily complex.