I tried the suggested stats, but got wrecked repeatedly for having around 13-14k health. What health level should i start at? 16k? 17k? :P
well if you tried deception with 14k health you are just hurting yourself. I'll say get full BM dps gear, try to get around 17k health and then use the deception spec. If you dont have a full dps gear and are not close to 16k hp+ you should not try any dps spec in pvp.
As a dps, if your damage is not very good or amazing, you are almost useless in a warzone. The healers will outheal your damage and you'll die quickly. Yes you'll be more usefull if your team is focussing someone but you will be a lot more usefull if you use a tank/hybrid spec while you are undergeared. The extra survivability will allow you to guard a node and survive till the backup arrive and it will help you to stay alive longer to guard the healer and then help your team.
(NEVER EVER use a tank gear with a dps spec)