Offensively, we probably open with our Domain + Eagle God's Defiance (triggering Primal War Calling) and then pull up Grinding Glacial Melody + Implacable Advance, and then work to keep pressure on, Echoes, HC, movement, etc. Our defensive moves would be used required.
This... doesn't seem like enough? It might be, but it feels like it's skipping the steps we use to actually win under most circumstances, relying heavily on our new Arts to control the field perfectly to prevent Ji Rong from acting as he desires, preventing us from leveraging our
other new Arts and testing ourselves fully.
Defensively, we open with our Domain, drop Zhengui to build up and Hanyi to be annoying, then bring up Zephyr's Mocking Escape (Avoid) and Rippling Starless Shroud (Armor) to ensure we can handle whatever he can bring to bear, Echoes of Absolute Winter to take advantage of the failed attacks + increase the odds
of failed attacks, Frozen Walls, Homely Keep to push our Qi regen even higher (and the regen of Zhengui + Hanyi + Sixiang), and
then start bringing up our offensive field effects.
Oh, and bring IPF up sometime through that in either case, though we aren't going to finish with a Toasted CtE. Too likely to just kill him outright, the way it did that one Bai.
I think the trobule with a defensive posture is Ling Qi is obvious weakness. He's not going to go after her as she tried to ramp up. He's going to go after her kids. We can dodge. The turtle can't.
If he does that he leaves Relong wide open, and Zhengui is more durable - and Defensive almost certainly has us bringing up RSS nearly immediately.
[X] Defensive strategy. With your spirits build up your advantage of vitality and defense until it is insurmountable.