I am not sure the titantium pack really is best value. let's compare it to elite:
you bought 2 titanium packs for 360 credits total, in which you could have bought 9 elite packs. in 9 elite packs you get 63 cards - 3 more than you got and 9 guaranteed rares, also 3 more guaranteed rares.
other than that, there is the doubles issue. since there are a few expensive cards in each clan - you don't want to block yourself from getting more than two of them. say you pick huracan, you'd rather get two el divino instead of pulling one and pandagran.
doubles=good, or at least not bad.
in NB day your goal is to draw these doubles, and as many of them as possible. same point
when i open packs i pick vortex (dagg, dregn, shak, x-0dus and so on) uppers (zatman, dorian, hefty etc...) huracan and junkz (romana, rowdy, qubik, gil, nobrodroid)
Piranas can be bad because of their cheap rares (Katan, Ulrich, Pesth, Deadeye) but I think that won't be a big problem with Elite packs where only 15% of the cards is rare
But almost every clan has this problem, only AS, Frozn, Huracan and Roots have all 3k+ rares
Yeha i was wrong there with the rare count, but it is not as imporatant as the doubles issue. twelve rares won't help you much if you can only pull each good rare once. even if you pick piranas (which is a matter of preference really) you are more likely to pull good rares in elite - since the chance of pulling one does not drop with every good rare you draw.