http://www.project1999.com/forums/sh...4&postcount=47
Concussion was tested on this server and proved to function as it is claimed in my posts and the links I provided.
Jolt is basically the same spell. So it should function the exact same. Should be easy enough to test though.
Exact aggro amount is up in the air as that's a bit more tedious to determine, however concussion does indeed drop you on aggro if you get resisted. On live it was the same amount so I'd guess if it's working to decrease aggro here, it decreases by the same amount already.
The Cliff Golem would be fine. Those dragoons in OT are magic immune so those would work well. Any guard at a city gate is magic immune so you can test off those also.