Full Physical Tank Corrin

I'm looking for feedback on this build. It has been testing well in the Simulator. She can fight well against most the physical units I have put her up against. She can fight magic but it very much isn't her role.

Lightning Breath+
Swap
Ignis
Steady Breath
Quick Riposte 3
Threaten Res 3
Defense +3
IVs +Spd -Res