I mean, I guess this is a fine kitchen table deck. If you ever go to a modern tournament with it, you will probably not win a single time though. So I guess my first question would be how you want to improve your deck. Do you want to get an actual competitive modern deck? Then I honestly recommend scrapping this deck entirely and building a new one. Are you dead set on making a Magda - Treasure - Dragon deck as competitively as possible in modern? Do you just want to improve your kitchen table deck a bit? What are your parameters for that? Any budget constraints/ constraints from your play group?