My high-score is 247,641 which is basically a 3072 and a 1536 but at that point... I don't know. I feel like my technique is lacking, it's as though there's just something I don't know that will make me better and I can't access that knowledge. Probably planning ahead for potential killing cards?
Just over 200k is my high-score and I've yet to witness the 6144 card. Still out here trying though!