solo farming plat as enchanter is a rough life. The best way to make plat (for any class) is two boxing in a group with a friend or two. Then pick a zone with solid money and just go grind a bit. Popular options for the method with friends are First Ruins, Citadel, Blood Quarry. Boxing isn't mandatory obviously, can generate platinum by grouping with people in general. More real players is more people to split with though!
i'm unaware of any decent spots solo as an enchanter, but enchanter w/ a tank works in a lot of zones, Overgrowth is one of my favorites for low effort farming.