Howdy! So, my suggestion, Alchy all the way. I have a 70 rogue who's an engineer and basically, I stopped pursuing the profession at around 330 due to the lack of a promising future. Really, it's a pvp profession. If you don't spend TONS of time pvp'g, then you're gonna loose about the only viable benefit of the profession - other than the fact that it pairs with Mining which is a HUGE money maker.
I'm a huge believer in the fact that one of your main chars needs to be an Alchy due to the availability of pots for your alts, xmutes to make money, items, etc. Additionally, if you're Alchy and have Herbs then you can make some serious money with the herbs themselves as well. If not, it's expensive to level up do to the high cost of herbs on most servers. Note - enchanting is never going to change for you if you only use for DE - you will cap out and not be able to DE high end stuff due to the realtively new implementation of skill level playing a role in what you can and cannot DE.
Good Luck!