You will need the potions or at least something else just as an addition to your character-since most other things will not be of any use to you except tailoring or perhaps engineering.
I suggest you stick with the two you have, you now know how to use it, the potions are very useful, and you can make good money off of it.
Dont worry about rolling in the dough, AH items and spells will get so expensive soon it will be tough for you to keep up.
At least for the guilds sake (since it seems clear Alliacen is going to win) why dont you try a Gnome or Human Warlock/mage, something so you can see if you would find it tolerable to play Alliance with us-plus you would have an all new experience in, quite frankly, better realized zones on the Alliance side.
I don't intend on playing with the CG guild. The majority seems to want PvE-Alliance, which is the exact opposite of what I want: PvP-Horde.
And as much as Blizzard favors the Alliance, I'm still sticking with the Horde, specifically, the Undead. After growing up in the inky darkness of Deathknell, Brill, the Under City and Silver Pine, I just can't see it happening any differently.
Plus, the Alliance just sucks. People are stupider, less talented at PVP, more prone to griefing, etc. I mean, jesus, Alliance has Gnomes.
Every griefing piece of shit is going to play one of those cute bubbly-loli pricks.
While I don't know if I'll stay with a Warlock, (the Mage's teleportation abilities are really tempting), I know for a fact I'm staying with the Horde. Nothing against you and the CG guild, but, there you go.