The higher you move up, the harder it is to nail people. It also becomes more expensive to heal yourself. I used to nail people at lower levels until they were dead or in the hospital. I found out the hard way that people don't like that so much 😉
Now I take one shot when I surf the fight list, sometimes two, when an attack generates a lot of experience points. I also stay away from people with low member counts, as they are the ones that usually hang at a level and cream whomever attacks them. God forbid if you kill one of them.
Another hint. If you have someone that is relentlessly killing or attacking you, it is usually better to lay low, as opposed to bouncing back quickly. People are impulsive, but have short-term memory. Also, there is a certain period of time after which they can not attack you again, just punch or hitlist you, I think it's a couple of hours.
Well, I made it to 124, and now is the time of day I usually have my date with RoosterROO. It usually goes something like this. I beat the shit out of him all day, and then rig his car. He comes to hitlist me, blows up, and then hitlists me. If I am lucky, I get to rig his ignition again, if not, he will hit me again around 1:00AM...