If I were you extended or elite are perfect tbh. Those can expand your collection and you can find some great pulls from there.
Strictly speaking, I've bought titanium. Got about 60k worth of stuff. Good for getting rares that I specifically might need.
I also bought 8 packs
of Elite and got 110k worth of stuff.
And then recently did 16 packs
of newblood...got a Thorpah
and that was about it, totally about 36k total in clintz.. (On friday) Pretty much one of the worse things ever. People who say newblood, well don't do it tbh. Not cause of what happened to me, but there really isn't many cards in there that are decent compared to the older cards. Also, you will make more clintz per creditz if you do Elite/Extended.
After that, I bought 4 packs
of extended and got 40k worth of stuff haha.
Soon after I was mad I bought another 10 packs
of extended and got 100k worth of stuff again.
Tbh, if you really look at all the cards that are available in UR, you'll notice that NB has like a small amount of cards worth over 15k. You have a better chance of not getting the same crappy card over and over again with such a small selection if you do Elite/extended.
Elite/Extended for clitnz and increasing your collection. Titanium for getting select clan rares you want for your collection. New blood if you want troll yourself getting the same pulls over and over again.