Save your Charms for Quests and later on  

because it all comes out random anyway .. 

unless your actually already crafting 5-6 gear , but by then you will know what you need

P.S. Most of the 3-4 stuff you ca sell for Profits

You ONLY need Crit % gloves ,, ATK% Chest and SPEED BOOTS 

most of the rest of 3-4 you can get better from Drops in Dragon and Fire Knight 

at Low lvl if you can get to Veldemar strait and farm the boss for life steal

you will be better off ,, you have to do Quests in Campaign anyway 

and your Prob not able to Solo  12/3 Brutal yet anyway for farming

"You ONLY need Crit % gloves ,, ATK% Chest and SPEED BOOTS "

Ignore this (other than speed boots of course).  DEF% HP% ACC RES CD% all great primary stats.  

Perception is the best gear by farm, save charms until you are getting guaranteed 5*/6* gear

Don't farm gear in campaign, get gear from dungeons/forge/market.