Sell your 4 ads @ 950k each in game and then just buy cards from vendors, stuff is super cheap now.
Also, we can't really help you out too much unless you tell us what kind of gear you have access to.
Generally Knights get crit through 2x Kobold deathloops, Gryphon headgear and then adding luk and using a DDT Nibelung. :x which isn't particularly accessible to new players.
If you want, pm me and we can discuss stuff further. It might be easier than waiting for the other person to reply in a thread.