now that im back after half a year which pack should i buy and how come the memory is 1.7GB i thought it was around 2-2.1GB so did konami slow down the memory?
Go for the latest minibox (Clash of Wings) and build a deck Fur Hire.
It's one of the strongest deck at the moment, and one of the cheapest too, since only Beat is SR (you need 2-3 copies though), the remaining cards Fur Hire are R or N. Then add a few staples like Enemy Controller and Wall of Disruption, and you're good to go.
Get the latest box and play Fur Hire. Its the easiest to get the cards, SR and below. Use enemy controller with it and you will have fairly solid deck. Amazon takes some work in ranked, leveling Mai and Gate dueling Mai. Spellbook needs Its UR card, M Heroes cost money and needs a UR, Geargia needs Ties and its UR. Fur Hire is basically f2p.