First of all. We all know that it's more than likely that SEELE is going 

to attack.

How about a preemtive strike?

So they are capable of instant regeneration should a limb be cut off.

You should be more specific about who "they" are here.

We have neither the time or resources to do so. Besides, if it can

survive an explosion that created the Second Impact, then there's not
much chance of us succeeding<<

Alternatives:
A. Throw it down a volcano.
B. Shoot it into the sun.

It might survive those. But any attempt to recover it won't.

"Then it looks like we have to destroy those EVAs completely. Otherwise 

we're all goners."

I suggest concentrating on taking out the plugs or cores first.

Sanshi sweated nervously at her newfound confidence

How can it sweat?

At first, it was just a contingency or a backup for the Third Impact.

It's still that way now, only this time, what it's for is different.
It's to make sure that another Impact doesn't happen.<<

IT? Don't you mean she?

"To take her anywhere but here."

Big misktake. What if SEELE had someone watching for just such an 
opportunity and grab her. Better keep her where they can keep an eye on 
her. Too bad they don't have another EVA handy.