Survivor - 10 pts - Survive combat with low health 250 times.
Requirements: Extremely low life regen, but not zero life regen. 1-10 would be best.
Get hurt really bad, taking you to less than 1% life. Once your screen gives you the "Survived with X.X% health" your good.
Now whatever you do.. dont heal or pot. Take off your weapons immediately. Find a nice safe place to attack any enemy. I used Sarkoth.
Every second, you will get the "Survived with X.X% health", as long as you are attacking something.
~250 seconds later, easy peezy achievement.