I have a 7max-48ar LG (lvl21). I found one website that seems to imply 6max-48ar was perfect, so I'm not sure what the 7max range falls into.

Thanks in advance for a full list, or info on this specific charm. Also, do people even use max/ar boosters over max/ar/life?

6/48/x mod is lvl 18
7-10 max/76/up to 25 life is lvl 30

Check the sticky thread above for Lld resources there’s an “items to keep” thread that should list charms