No, buy a titanium pack. Go for the expensive clans which are:
Uppers / Bangers / Skeelz
That way you can sell the cards and buy the cards you want and make some pofit for other cards as well. as forthe rest i would advise you to wait until next friday and buy a load of new blood then.
hope this helps, thanks mods
Nightmare also has a reasonable amount of expensive cards.