With PriorityPass you indeed have to go to T2 and either Air France lounge or one of the two non-Schengen ones. They are not exactly worth a bother, but it's not like you don't have time in spades.
With UA Gold and up you can enter any LH Senator lounge with a guest. With Amex Plat you can access Lufthansa lounges but you must fly LH Group. I don't believe Discover counts.