Lvl 0 stock bomb - I think this is important to cripple any decks with Experience especially if they have no other way to fix this.
Lvl 0 runner - Best way I can see to stall at that level so i can run a low amount of lvl 0s.
Lvl 1 Aqua (combo) - The potential plus is insane.
Lvl 1 Kazuma - Used with the split 3k 1 soul it is an easy reverse also the lvl 0 and cost 0 stock bombs will buff him even more if needed.
Lvl 1 Vanir - Very simple and easy change to pay for, change target will help so much.
Lvl 1 Backup - Negates a plussing combo most of the time but not essential to be used.
Lvl 2 Assist - Easily sets up the set 1 Darkness Lvl 3 early play.
Lvl 2 Event - Versatile card that is great on both turns, either stopping anti damage or opponents finishing combos.
Lvl 3 Changers - Both are strong and can allow for varied plays depending on the situation.
Lvl 3 Darkness (Combo) - Strong finisher and can ever be added on top of musashi.
Lvl 3 Set 1 Darkness - Very hard for opponent to get rid of so it can generate board advantage most of the time.
Any tips or suggestions of things I may have overlooked or missed please let me know.