Yeah I put Miracle on her but I've yet to try it out, keep meaning to haha. I always ran her with two mythics, which is as much bulk as she'd have on astra. She's always had my summoner support so that helps, and being buffed +6/7 in all stats helps, I guess getting res and spd as mythic boosts rather than atk/def on astra is better for her. Pulse Smoke is the most useful thing though, being able to defuse Ophelias/IP teams is very nice.