It was quite the cheap tactic but its very safe and made the fight a painless win at Lv. 83 on Hard mode.
Skills:
Add Combo 1/2
Blunt Force
Stun Extender
Staggering Strike
Critical
Destroyer (vitally important)
Cut to the Chase 2 (also important)
Exploit Weakness (helps)
Counterstrike
Counterstun (helps)
Body Guard 2
Magic Guard 2
Countermend HP
Countermend TP
TC Counterkeeper (important0
Combo Tonic
Combo Voltage
Athelete I (helps if you don't have perfect movement on your own)
Break Binder
Exceed 1/2
Notable equipment:
Nereis Flosse (for the extra TC)
Thunder Badge (to exploit element weakness)
With these skills you only actually need two artes to win. All you need are Two Tourbillions and La Cle Rouge.
Make Shadow Ines whiff an attack and then run away and use La Cle Rouge and then have her whiff again and then hit with Two Tourbillions, this should guard break her right on the spot and you have her open for whatever combo you want. Counter her when possible for the bonuses, if she's stunned or you get her in a Chase Link, that's the time to use and TP items if you need to; keep the pressure on until you run out of TP/TC. Repeat the process til she's dead.
If, for some reason, you do end up in a combo, just use a Lv1 Overlimit and escape it. Do what you need to do to make sure your HP is high enough for you to feel safe and then start from square 1.