Qeynos casters guild is easy to raise, you can buy all the ingredients for one of their quests from vendors. One in EC and one in Kithicor:
http://wiki.project1999.com/Unser%27s_Call
If all you are after is faction, don't waste time collecting gnoll fangs just turn in Brandy for this quest which has the added benefit of raising Freeport merchants and banker and won't tank your corrupt qeynos guards either.
http://wiki.project1999.com/Rohand%27s_Brandy