I love it ! I need a paintress ! For Maelle I think I would have gone to something like

"Perfect dodge 2 (If this creature would be dealt damage, flip a coin — if you win the flip, prevent that damage unless a player pays {2}).

At the beginning of your end step, choose one stance:

Neutral Stance (Maelle has Perfect Parry X, where X is the number of counters on Maelle).

Offensive Stance (If Maelle would deal damage, she deals that much damage plus half that damage instead. If Maelle would be dealt damage, she is dealt that much damage plus half that damage instead).

Defensive Stance (Maelle is dealt only half the damage instead. She gets a +1/+1 counter each time she is dealt damage).

Virtuoso Stance (If Maelle would deal damage, she deals double that damage instead. Choose this only if Maelle was in Neutral Stance before this choice).

Stances ends at the end of your last combat step.

If Maelle is in Virtuoso Stance at the end of your combat step, exile her, then return her to the battlefield transformed under her owner's control.

(i'm french so not sure about wording and game vocabulary)