Well, if I had to choose between 5 or 6 I would actually settle on 5. Tager and Haku have always had a close matchup, and it was actually the only matchup in Tager's favor in CT. It's 5-5, because it's lopsided in Tager's favor when he is in your face, and in Haku's when he's far away. (Although I feel that Tager has greater advantage when he is up close, than when Haku does when he's far away, since you get way less damage off random pokes and have to succeed in landing them more.)
Kind of like Lambda and Haku. Someone once described it as being 7-3 in favor of whoever is in control at the time, so it washes out to 5-5.
I expect Tager to have a better matchup in CP.
Also for bursts, I remember when your own burst was basically a second burst for Nu since it would knock her full screen again.