Since the final goal of this game is to play it pvp i think that points taken fighting AI shouldnt be the same kind of those won in pvp.
I propose 2 different scores for each player: pvp and cpu.
This because there's not so much glory in grinding fg or top50, while pvp it's really harder even against not so good decks because of human play. Another reason is the simple thing that a pvp strong player will never come to the top50 because using his time to pvp, not grinding!
Other ideas are welcome, just to change the score sistem we have now