I just checked your AH (alliance side, Runetotem, quite sure that's you guys since horde side did not have those robes up. ) What you should notice: One person is having them up, he's having five of them, and the other mystic frostwoven pieces are not up except some wrist for 37g.
So... A snapshot of your AH atm
Mystic Frostwoven Wristwraps
2 Northsea pearls=2g (3 up for 1g50)
4 eternium thread: 12
25 frostweave: 7 g (that's 2 stacks at 3.50 each, so you have 15 cloth left afterwards)
Undercut the poor bugger selling the wrists -35 g. Expences: 25. 10 g profit.
Or just make the shoulders that noone has up, basically same material cost (a pearl less, ten more cloth, but that's still covered by the suggested price) and no competition.
Since they vendor for three gold they're cheap to keep up, so you can afford posting them without sales relatively regularly.
The point is: Five very cheap robes like that probably reads "person leveling his tailoring and not really caring about profit as long as it's more than vendorprice". Considering the lack of competition on the other pieces I think it's quite possible you can earn gold there. As you said yourself, the cloak is not up.
Now, pvp pieces. Again using your server.
Frostsavage robe 2 of these, to use full eternals. Yes, I am lazy. Atm the cheapest up cost 69 g, let's say you can sell two for 120.
80 cloth: 16 gold (I just upped the stack price since you can't just take the two cheapest)
4 eternium thread: 12 gold (I'm going to remember the price of eternium thread for the rest of my life... Remember to buy them somewhere you're exalted for the discount)
16 infinite dust: 23 g (that's a stack)
Eternal fire: 23 g (note, this price might drop tomorrow when frozen orbs can be converted into it, also, frozen orbs are less than 20 g on your AH)
Eternal earth: 5g.
Total cost: 79. Profit: 41 minus AH cut.
Now, this is not a particularly good profit, but it is a profit, even with my relatively conservative pricings alternatives based on your AH. The reason it's "hard" to earn gold this way is that you need to diversify -it's hard to earn gold with tailoring crafting only one product, you'd want to for example make a full frostsavage set.
Though tbh, if you want a lower but regular income you might want to whisper me since I see one market there's still an opening for you in, but that I won't comment on here since it at least partly bases itself off lack of competition :P