what is "with challenger?"

I assume he mean's oppent. Parry's for the first round. If you win stick with parry's. If you lost a round. Rely on both, but breakers for long juggles. This will preven't alot of health loss. Also use breaker's for Infintie's. Parry's almost never work for someone like Kenshi. His 3,3,3, in Tai Chi, Paralises you.

I don't use breaker in the first round ever. Nobody should - that way you wear down the other person's breakers. I consider it a first round victory if you get the person to use all breakers, even if you lose that round. If you are good at parrying, go to town with it.

parry is very hard to perform with challenger becouse if you did not use parry correct timing then you need to use breakers if you have

if you have what?

Sure it's hard, but there are ways to bait them into a parry, and after a round you will know the person's strategy by then anyway.