Alchemist's StoneFollow

I'm a 69 lock. I currently have alchemy / herbalism but I don't have the Alchemist's Stone yet. I would like to have your advice on this trinket. Is it effective in heroics/raid situations? Is it better than the other popular trinkets (Scryers Bloodgem, Glowing Insigna, Terrokar tablet of Vim, etc...)

To be honest I don't like alchemy that much. I found it's not that useful for a lock. I thought about respeccing to Tailoring for the FSW set instead. On the other hand I enjoy herbalism so I'll probably keep that one since it's a good money maker.

Last question... Once you have your FSW set, is there's anything else to do with Tailoring? And once you got better gear, like T4 and up (I know it's going to take a while), what are the uses of Tailoring?

Thanks for your advices.

There is still use for tailoring after kara. Mobs drop patterns where the item that are crafted is bop. Also they drop other patterns that are boe so you need atleast 1 tailor in the raid.

That Alchemist stone is crap for locks :)