I'm not sure what L75 gears you are using. But in general, the CQ gears are best. You have a Chain Quest (CQ) starting at 74 for 75 gears, and another one starting at 85 for 85 gears. (You must finish the 75 one in order to unlock the 85 one).
However, in the meantime, there are some other 85 gear you can use while you progress through your quest.
1 - gear from the enraged tundro brothers (2 different sets, one is called Imbued Heartless Fighter __ , the other is called Imbued ___ of Aggression)
2 - toah gear (Imbued Atlantian Destroyer ___)
3 - CI gear (Imbued Fighter ___) -- probably easiest to get a full set if you plan to buy
For 85 weapons, it depends what you want. If you want HP abs, the new GT weapons (eg rusty moon __ ) or ulric weapons (Imbued bloodletter ___)will give that. If you prefer pure hit/crit damage dealing then some of the GT weapons (brilliant moon __) or imbued nereus will give that.
Just search NSDB for more details... you can filter to L85 and check out what's available.