just so you know as qantas biz pax, alliance with Emirates means business passenger can access emirates lounge also
https://www.ausbt.com.au/a-qantas-flyer-s-guide-to-emirates-airport-lounge-access

i am not familiar with opening hours as its flight dependent but i can tell you at both SYD and AKL airports, Emirates lounge were far superior in terms of food and.alcohol offerings... in Auckland i think emirates lounge was right next to QF lounge, i am not sure if they are open at those hours but definitely worth a check.