GL-AC750 limited WWAN speeds

I have my MiFi 8000 connected to my GL-AR750 via 5Ghz wifi, and I can only get into the 40 mbps speed range though it. When connected directly to the MiFi my minimum speed is 50 mbps (usually closer to 70 mbps). I am wondering what I can do to get my full bandwidth from the MiFi through my GL-AR750.

Maybe 40 mbps is good enough for repeater.

@alzhao This is on 5Ghz, I would think that I should be able to get at least 100 Mbps.

When you use repeater its speed will not go over directly connected. Usually it will be slower.