(LA) Hector B slot

Wary Fighter and Vantage are the best 2 options by the sound of it.

Vantage if you give him the QR Seal, otherwise I'd say Quick Riposte 2. He can trigger Ignis every Enemy Phase if he is doubled and still in range of QR. Wary Fighter is decent enough if you don't have anything else to give him.

Honestly think wary fighter is best, many people disagree but I find going for stuff like quick riposte ignis is overkill, lets him beat a lot of units he usually couldn't including swords, they hit him he counters with glimmer +10, next round you hit them with another glimmer and they die
Whereas if you use quick riposte they'll hit you twice before you hit them twice and if it's someone like ayra you're dead xd
lets you deal with mages with desperation too
I use a healer though which helps keep wary fighter up, if you don't vantage might be better

I prefer using Vantage.

LA Hector is with quick riposte and vantage is just a normal 5*+10 hector. The wary fighter B slot + wrath skill axe is unique and works only with him