I did not 'pick off the weak' as you said. In fact, I picked off my entire pk range, whether they were level 51 or not. I constantly fought against Xubetok, Jalenkan (level 51 elf villager with STSF), various outlanders. I fought against Ruhktanshi (although I never got you...what, was it 0 - 1 at the end?), various bards, groups of Villagers, Inger with his berserking which nearly killed me a few times. Shit, I fought, as a level 43 AP, against Macha alone. This was the same style as Sebath (look at my log against Jhuttr when I was 41 and he was 51). As I said before, I like the challenge - hell, if I was in the empire, I would've fought against Igbah and Waris. Not to mention, I fought against you.
I fight by being prepared. All those times I teleported, I wasn't prepared. Funny thing is, quite often I didn't teleport, but ran to another area, and hoped that they would follow me. In the meantime, put up my saves, enlarge, flight, iron grip, etc.
If they were in a group, hell yea I'm going to attack the weaker one who has the potential to lag me first. If they are in a group, hell yea I'm going to try to cleave one of them so I can go after the other one.