If you send a psn msg to your partner you will hook up faster and easier. Or so it seems. Also, (courtesy of Luvs2fight) if you use the yellow soap stone and leave msg around a summon that is hard to connect (fails) with...it supposedly helps.
Ps...Grin, may I join the event? I recall you said non-cove people could. Am I right? If I can I'll bring a partner...don't know who yet.